5th printing, 2015. All books signed by the author. This self-paced book was written by a whale biologist for middle school children interested in pursuing a career in whale biology. It is one of the most comprehensive children's text on whales and whale biologists ever produced. Plus, it incorporates actual data collected by whale biologists. The book is filled with activities that whale biologists do including: Mapping the migration of Whales; Fluke Identification of Humpbacks; Calculating the speed of whales and the respiration rates of whales; A Day with a Blue Whale. The book also has 6 interviews with whale biologists. In addition, there are 4 activities on whaling and conservation; How to draw a whale; Identifying whales by scientific key and numerous activities on whale biology. If you are looking for depth on the topic of whales this is the book for you.