Let’s Talk Bookish: Duologies vs. Trilogies

Happy Friday! I am very pleased that my hand/wrist is doing better this week, because it made typing and putting this post together SO much easier!

To start July off, we are discussing series lengths, namely, 2 or 3 books?

I have always been someone who says ‘the longer the better’ when it comes to book series. However, I am also someone who is really bad at actually finishing those series. Regardless, I think I still agree with that statement for the most part because I love really getting to know a story and its characters. I am willing to invest my time into learning more about a world and following characters over more of their lives.

I am primarily a fantasy reader, and this genre lends itself well to having books in series. Trilogies are one of my favourite series lengths overall. I haven’t done the calculating, but I think the majority of what I read is trilogies. They’re super common in the sff sphere! I enjoy the fact that there is that little investment on the reader’s part, in return for the extra detail and time in the overall story. I also like that you know it isn’t going to take years and years to wrap up, usually no more than 3.

That isn’t to say that I don’t enjoy a duology, because I do. I am an equal-opportunity book-length reader! I haven’t read that many of them because weirdly, it’s harder for me to find ones I am interested in. I probably need to look better, but most I have found recently have been romantasy, and that isn’t something I read all that much. Although maybe it isn’t weird, since as I noted already, straight fantasy lends itself well to bigger series, and that is what I tend to read genre-wise!

I think this entire answer comes down to what specific story is being told. As I said, I love a long series. My favourite series of all time is just about to have book 8 published! But not every series needs that many books. If we are following a character navigating a specific event, two or three books are probably going to be enough to give a really satisfying story. If we are following a character through their entire life, or at least a significant portion of it, then maybe you’ll want more books to tell it properly.

As for benefits to shorter series, from a reader’s perspective, there are several. You have less time to wait to get that ending. You are less likely to get fatigued and forget about important details that you might need in later books. The plot is more likely to be easy(ish) to follow over a shorter series too.

One of my favourite series of all time is a trilogy, namely Between Earth and Sky by Rebecca Roanhorse. Set in a pre-Colombian Americas world, it has politics, prophecies and very cool magic!

Another top-tier trilogy for me is The Green Bone Saga by Fonda Lee. This series took me by surprise with how much I love it – it’s a geopolitical urban fantasy, and the family dynamics and characters are just incredible.

The Radiant Emperor duology by Shelley Parker-Chan blew me away and is firmly cemented as a favourite. It’s quite violent, but incredibly written and tells a gender-swapped story of the fall of the Mongol Empire.

Laini Taylor writes some of my favourite books. Her trilogy, Daughter of Smoke and Bone is one of my long-time loves, being one of the first fantasy series I ever read! She also has the Strange the Dreamer duology, of which I have to read book 2, but adored the first!

My most recent favourite duology is The DallerGut Dream Department Store by MiYe Lee. Such a fun, quirky pair of books with the most amazing covers.

The Bloodsworn Saga by John Gwynne is exactly the sort of epic fantasy series that I love to dig my teeth into. Gritty, Norse-inspired fantasy with incredible battles and such real characters.

Other honourable mentions are:

  • The Rages trilogy by Kritika H. Rao. This would be in my favourites above, but it’s not finished yet! However I LOVE what is already published – eco science fantasy with some amazing characters and a really compelling magic system.
  • The Ending Fire trilogy by Saraa El-Arifi. I’ve only read 1 & 2, but it’s such a cool and unique setting and magic!
  • Monk & Robot duology by Becky Chambers. If you want a peaceful, thought-provoking tale about purpose and connection, definitely read this lovely pair.
  • The Luminaries trilogy by Susan Dennard. A mysterious and dark ya filled with nightmare monsters and a very determined fmc! Recommend the audios for this series.
  • Gogmagog duology by Jeff Noon and Steve Beard. If you ever want something totally weird and lots of fun, definitely try these books!
  • The Rise and Fall of Aos by Danielle Lauren is a wonderful, climate-fantasy duology with lots of magic and great characters.

15 responses to “Let’s Talk Bookish: Duologies vs. Trilogies”

  1. What a thoughtful and well-articulated reflection on series lengths — I love how balanced your perspective is! I completely agree that it really depends on the story being told. Some narratives beg for sprawling epics with room to breathe, while others shine in the tighter, more contained space of a duology or trilogy. You nailed a key point about shorter series too — the reduced risk of reader fatigue and the satisfaction of seeing a story conclude without waiting years is a definite perk.

    I also appreciate how you mentioned the genre’s influence. Fantasy, especially epic or high fantasy, naturally lends itself to longer series with rich worldbuilding, while duologies seem more common in romantasy or speculative fiction with a narrower focus. Your list of favourites is fantastic — Between Earth and Sky and The Green Bone Saga are absolute gems, and I love seeing The Radiant Emperor duology getting the praise it deserves.

    Also, you mentioning Monk & Robot makes me want to reread those peaceful, cozy books — Becky Chambers is so good at making you think and feel. I haven’t tried Gogmagog, but now I’m definitely curious after your “totally weird and lots of fun” description — sometimes that’s exactly the vibe you need!

    Overall, I love your “the longer the better… if I can finish it” approach — so relatable. Thanks for sharing this; it’s such a great look into why series length matters but isn’t everything!

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    1. Thank you so much Julie!
      While I have read so many great standalones in the fantasy genre, there’s something really special imo about at least a trilogy where you can really get to know a story well.

      I am always surprised to see that Radiant Emperor seems to fly under the radar a lot. It’s scope is incredible for a duology – possibly the best duology I have ever read!

      Gogmagog is the dictionary definition of weird sff haha, but I loved it. It’s hilarious, and you need to be prepared for a lot of ‘no idea what going on but just roll with it’ vibes.

      Liked by 1 person

  2. I agree on the fact that trilogies work best in fantasy, I often don’t like fantasy standalones. I understand why there are a lot of romantasy ones though, because many of the YA readers evolved into romantasy readers and they are used to reading trilogies mostly.

    Great post!

    My post: https://laurieisreading.com/2025/07/04/lets-talk-bookish-duologies-vs-trilogies/

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    1. I’ve definitely read a fair amount of fantasy standalones that I’ve enjoyed, but often there’s no comparison to a good long series!

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  3. […] Emma @ Pages of EmmaLeyre @ Read You LeyreLost @ Chronicles of Tick TockAbyssal LibrarianJulie @ Bookflowerpath […]

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  4. Great post! I’m fully with you on being an equal opportunity book-length reader. 😄 I think the majority of series that I’ve read over my years of reading have been trilogies but I find myself gravitating more toward duologies these days. Fully due to my diminishing attention span, patience, and inability to finish series, lol. I do love that you get to really become immersed in a new world and characters lives with a longer series—TGBS is a prime example of that and remains my favourite series of all time. I also loved DoSaB and BEaS!

    I’m curious now about your favourite series of all time! What series is it? 👀 Thanks for joining LTB this week!

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    1. Trilogies seem to be the backbone of fantasy don’t they! I’ll keep searching for good duologies, but the trilogies do tend to be more suited to me.

      My favourite series is Green Rider by Kristen Britain! I have an arc for book 8 and I am not okay lol.

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  5. I think my heart belongs to the trilogy when it comes to fantasy, but I will say that I have developed an appreciation for the duology format – which seems to have become more popular in recent times!

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    1. That’s fair! I’ve struggled to find duologies I’m interested in, since I am not a romantasy reader, but maybe I haven’t been looking hard enough.

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      1. To be fair, they do seem to be the most common in the romantasy genre!

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  6. Great Post and I found new fantasy books to add to my tbr, I’ve always stayed away but loved the ones I grab. As for Duologies and Trilogies, it depends on how well the author does it. There are some that works well and there are others where it didn’t need the extra two it was fine at Book 1&2 max

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    1. Happy to hear! Which ones have interested you?

      Definitely agree – a lot depends on how the author writes for sure!

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  7. The ones by Rebecca Roanhouse sound very interesting. And the cover is stunning

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    1. Ah my favourites! I hope you enjoy if you do pick them up.

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  8. […] Let’s Talk Bookish: Duologies vs. Trilogies ⇉ Pages of Emma […]

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I’m Emma (she/her), a 30-something living in the UK. I love to read fantasy, science fiction and non-fiction books, though I do dip into many other genres. Enjoy your reading!

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