I very much enjoyed Quirkology and looked to Wiseman's back catalogue hoping to find something just as interesting. Alas, Did you Spot The Gorilla was most disappointing in comparison. Not least because it was so short. Though it is quoted as being of over a hundred pages the actual pages of readable text amount to noticeably less than that. There are cartoons and many instances of blank pages used throughout the book to pad out its size too. Which I felt was a little naughty.
Despite its shortness, it's not too bad a book; just not up to the standard I expected of him, having loved his other book. So, at the end of the day, I feel that the author (characteristically an experimenter) was trying out an experiment in how little could be published and yet still be received as a sucessful book. His successful book remains, Quirkology, and unless you are more of a fan of Wiseman than I am (& I am!) then stick to that instead.