Britain's Sea Mammals was published by Princeton University Press in 2012. Jon Dunn was the author, and contributing photographer.
Written as the ultimate guide to all 34 species of sea mammal ever encountered in British and Irish waters, Britain's Sea Mammals has been well-received:
"An essential guide to all the sea mammals - whales, dolphins, porpoises and seals - found in coastal Britain" Wildlife
"Top notch... from the detailed records of vagrants and their identification, to expert tips on how to see the likes of Humpback and Killer Whales, it is all here" Birding World
"An excellent identification guide... stuffed with useful maps, photos, tips and illustrations showing above and below water profilfes" RSPB Birds Magazine
"As a field guide this is an excellent book... but it is not just a field guide, as it tells you where to go, when to go, and a lot about the ecology and conservation of the species you might see. This book is highly recommended... as it will be useful for the casual observer right up to the obsessive cetacean twitcher" Reference Reviews
Available from all good booksellers, including Amazon.