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Best Book Series for Adults

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When we decided to write a post about the best book series for adults, we thought it was the perfect opportunity to ask our voracious readers for help. And wow did they come through!

We had almost 300 people share their favorite adult book series and why they loved it.

We sorted through all the results and narrowed down the list based on the books that had multiple recommendations from different readers. You’ll see a mix of the most popular book series for adults and some lesser-known surprises!

Text over book covers reading "Best Book Series for Adults"

Each series has an entry, below, that includes everything you’ll need to pick a good book series that matches your reading preferences. For example, we note whether each book is a stand-alone, sequential series, or somewhere in between.

With a stand-alone series, you can pick up any book and read it without reading the prior installments. A sequential series means that the books must be read in order. For example, the end of each book has a cliffhanger that isn’t resolved until the next book. Or maybe certain aspects of the novel won’t make sense without knowing the backstory.

We also included the number of books currently available in each series. After that, you’ll find links to the first book and most recent book available.  

As we researched good book series for adults, one common thread emerged regardless of the genre. The second book is usually rated higher than the first.

While several factors probably play into that phenomenon, keep it in mind if you’re debating whether to continue reading a series after book one. Because you and the author both already know the characters, the second might be a more enjoyable read.

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Best Book Series for Adults

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Large white diamond with black text reading 19 of the Best Book Series for Adults, over the top of 4 mostly hidden book covers

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Friday 16th of September 2022

Kate Shugak by Dana Stabenow. If you haven’t read them you are SO missing out!

Karen Fontaine

Friday 25th of March 2022

Have you considered the Brooch Series by Katherine Lowry Logan? It is one of my favorites. I have read most of the series mentioned in your article.


Tuesday 1st of March 2022

I was surprised to not see the Bosch series by Michael Connelly here. It is a fantastic series with great characters. It is set in California and Harry Bosch is a detective that goes through a myriad of challenges within his career as a detective. There is love, loss and lots of excitement. P. S. The Lincoln Lawyer is his half brother and once in a while you will see Mickey Haller show up as a lawyer on one of Bosch's cases. Good series.


Sunday 20th of February 2022

I, too, missed the opportunity to recommend one of my all time favorite authors - William Kent Krueger. His Cork O'Connor series is one of those you can't quit thinking about. In fact, I may now have to start over with book one - Iron Lake.

Penny Sansbury

Tuesday 8th of February 2022

I would add the Dave Robichaux books by James Lee Burke with a caution that they can sometimes be a bit violent