I came across Stevyn Colgan by serendipitous means on Twitter and we even had a few brief conversations (about Cornwall, since you ask!) before I realised he was the Venerable Bede of QI and felt too awed to continue my fairly banal blathering. I retained, however, a sufficient sense of personal connection to want to buy "Constable Colgan's Connectoscope". I have to say that the only bad thing about the book is that it is too short. The good things are that it is funny, fascinating, elegantly written and clearly the work of a mind that functions in a faintly bizarre but warm and cuddly parallel universe.
If you enjoy talking to yourself along the lines of "good grief, I never knew that!" and indulging in wry chuckles, this is the book for you and anyone you want to impress with your immaculate taste in factual writing.