WHAT'S YOUR FAVORITE BOOK SERIES??? :D (GIRLS AND GUYS ONLY!!!)

So, Tell me what your favorite book series is!!! Please be honest because I really want to know what YOU guys think for REAL!!! Feel free to comment what you think about this survey, & comment if I DONT have your favorite book series on here!!! (pst, i'm sorry about that)

I read all of these book series before, they are all pretty cool! Feel free to check them out at the bookstore or at the library!!