The Wavewatcher's Companion is a 2010 science book by Gavin Pretor-Pinney.

The book's topics include: As Jennifer Ouellette of the Wall Street Journal describes, Pretor-Pinney 'employs a chatty, conversational tone, with clear technical explanations enlivened by real-world examples, whimsical asides, personal anecdotes and inventive analogies' to explain his subject.

Victoria Segal of The Guardian enthused that Pretor-Pinney "has the gifted teacher's knack for finding the right metaphor to hook the attention".

[2] Toby Clements of the Daily Telegraph felt it was a worthy sequel to Pretor-Pinney's previous surprise best-seller, 'The Cloudspotter's Guide.

Richard Holmes, the Chair of judging panel, said it was a 'highly unusual and outstandingly effective piece of popular science writing and that Pretor-Pinney "had managed to use relatively straight-forward science to transform the readers' perspective of the world around them".