“JUNIE B.’S THESE PUZZLES HURT MY BRAIN! BOOK,” by Barbara Park, illustrated by Denise Brunkus, Random House Books for Young Readers, May 24, 2011, $5.99 (ages 6 and up) The hardest part about reviewing “Junie B.’s These Puzzles Hurt My Brain! Book” was extracting the volume from my six year old’s hands once I’d let…