According to The Tracking Board, Universal Pictures is looking to adapt the 90s book series Animorphs by K. A. Applegate, with the studio currently seeking a writer for the project.
Published by Scholastic and launching in 1996, Animorphs revolves around five teens who are granted the ability to transform into any animal they touch and use their newfound abilities to battle a secret alien invasion.
Consisting of a whopping 54 books, Animorphs also spawned a Nickelodeon live action series, which ran for 26 episodes between 1998 and 2000.
https://www.youtube.com/watch?list=PL18yMRIfoszEaHYNDTy5C-cH9Oa2gN5ng&v=qvTY7eXXIMg