In the fifth book of the Charlie Small series, eight-year old Charlie continues to find danger around every corner.  In search of his friend, Charlie finds himself trapped underground with ape-men chasing him, encounters a megashark, and must defeat the evil Shadow who has taken over the underworld kingdom.  Written in a journal format with doodles and drawings, this book will appeal to reluctant readers and those who seek constant adventure. (Sarah Pauly for Colorado Blue Spruce Award, 2013)