Children participating in the Books-A-Million Summer Reading Program can earn a free hat by reading four books from a specified list and documenting them in a reading log. Once completed, the log must be shown at a Books-A-Million store to receive the free hat. This offer is designed to encourage reading during the summer months. 

 Books-A-Million's Summer Reading Program offers children a free hat for reading any four books from their challenge selection. Participants must write about the books in their reading log and present it in-store to claim their free hat.