Cam班上的代課老師真是一個大迷糊蟲，忘東忘西，連自己的手機和車鑰匙都弄丟了，讓Cam幫助他吧。 Cam and her classmates have a forgetful substitute teacher. First, heforgot the homework assignment. And where did he put his jacket? But when his car keys and cell phone go missing, everyone starts to wonder: did he lose them or were they stolen? Readers will love to click along with Cam as she solves this latest easy-to-read mystery.