Scholastic is once again breaking down the past month’s best-selling books based on purchases made through its US network of in-school book clubs. Read on for the top-five picture books, transitional readers, early chapter books, chapter books, middle grade, young adult and non-fiction from April-May 2011.

The top-five picture books:

1. Pinkalicious and the Pink Drink by Victoria Kann
2. Zoomer by Ned Young
3. Ready, Set, School! by Jacquelyn Mitchard
4. Ten Tiny Tadpoles by Debbie Tarbett
5. Summer Wonders by Bob Raczka

The top-five books for transitional readers:

1. I SPY a Butterfly riddles by Jean Marzollo, photos by Walter Wick
2. Barbie: I Can Be a Pet Vet
3. Splat the Cat Sings Flat by Rob Scotton
4. Ant Hill: Picnic! A Day in the Park by Joan Holub
5. Ready for Kindergarten, Stinky Face? by Lisa McCourt

The top-five early chapter books:

1. Kitty Corner: Otis by Ellen Miles
2. Calendar Mysteries: May Magic by Ron Roy
3. Magic Tree House: Summer of the Sea Serpent by Mary Pope Osborne
4.  The Summer Vacation from the Black Lagoon by Mike Thaler and Jared Lee
5. Rio: The Junior Novel by Lexa Hillyer

The top-five chapter books:

1. My Life as a Book by Janet Tashijan
2. Breakaway by Andrea Montalbano
3. The Lemonade War by Jacqueline Davies
4. Goosebumps Hall of Horrors: Night of the Giant Everything by R.L. Stine
5. Big Nate: From the Top by Lincoln Peirce

The top-five middle grade books:

1. The Kane Chronicles, Book Two: The Throne of Fire by Rick Riordan
2. The Kane Chronicles, Book One: The Red Pyramid by Rick Riordan
3. Liar, Liar by Gary Paulsen
4. Ruby Holler by Sharon Creech
5. Fire World by Chris d’Lacey

The top-five young adult books:

1. Stolen Children by Peg Kehret
2. Cut by Patricia McCormick
3. The Hunger Games by Suzanne Collins
4. What I Saw and How I Lied by Judy Blundell
5. Catching Fire by Suzanne Collins

The top-five in non-fiction:

1. The Wimpy Kid Movie Diary, Revised and Expanded by Jeff Kinney
2. The LEGO Book
3. Sea Horses
4. Soul Surfer by Bethany Hamilton and Sheryl Bark
5. Summer Activities (Usborne) by Fiona Watt

Visit Scholastic’s Book Talk for more information about the monthly bestsellers list.