All or Nothing
  • # of Books:
    8
  • First Book:
    March 2004
  • Latest Book:
    January 2021
  • Age Level:
    Chapter Books (Ages 7-10)
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The Xtreme World of Billy Kool Series in Order (8 Books)

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Frequently Asked Questions (FAQ)

There are 8 books in The Xtreme World of Billy Kool series.

The Xtreme World of Billy Kool series does not have a new book coming out soon. The latest book, Rock Climbing (Book 8), was published in January 2021.

The first book in The Xtreme World of Billy Kool series, All or Nothing, was published in March 2004.

The Xtreme World of Billy Kool series primarily falls into the General Fiction genre. This chapter book series was written for ages 7-10, but some older readers may still like to read these books.