U.S. Marshal Ezra Flint Western
11 books 2024–2026
Book series starting with U
60 book series, each with its books in reading order, in alphabetical order. Where several series share one name, a single entry leads to each of them.
All 60 series under U
Ultramarines
16 books 2002–2019
Unbound
3 series3 different series share this name, each with its own reading order.
Unbroken Heroes
2 series2 different series share this name, each with its own reading order.
Uncanny X-Men
81 books 1981–2025
Underdogs
3 series3 different series share this name, each with its own reading order.
Undertaker
2 series2 different series share this name, each with its own reading order.
Unfinished Business
2 series2 different series share this name, each with its own reading order.
Unforgettable
11 books 2021–2022
Unicorn Western
11 books 2013
Unlikely Heroes
2 series2 different series share this name, each with its own reading order.
Unlucky 13
13 books 2023
Unseen
2 series2 different series share this name, each with its own reading order.
Unsolved Mysteries
10 books 2002–2012
Up Close
12 books 2007–2009
Upstairs Downstairs
11 books 1971–1978
Usborne First Reading Level 2
22 books 2007–2015
Usborne Picture Books
32 books 2003–2018
Usborne Puzzle Adventures
35 books 1985–2025
Usborne Young Reading 1
52 books 1982–2016