CAM Jan & Mystery of the Dinosaur Bones / Babe Ruth Baseball Flip

David Adler's Cam Jansen series has been a reliable early chapter-book staple for decades, and this Puffin flip edition packages two complete mysteries in one volume: missing dinosaur bones at a museum and a stolen baseball at a stadium. Cam's photographic memory — activated by a quiet 'click' — is one of children's fiction's most distinctive character traits, and it gives young readers a practical model for observation and deduction. Large print and scattered black-and-white illustrations ease the transition from picture books. Common Sense Media's positive rating and Scholastic's long support of the series speak to the books' track record. The flip format is creative but may be physically awkward for small hands, and the mysteries are straightforward enough that older readers in the range will solve them quickly. Completely clean and a perennial classroom favorite.