British mathematician Wilson (Four Colors Suffice
) paints a charming picture of Charles Dodgson, aka Lewis Carroll, in this slender biography. Skipping over the most chronicled aspects of Dodgson's life with only a sharp side note deriding rumors of his pedophilia as “bad history and bad psychology,” Wilson focuses on Dodgson's mathematical and educational accomplishments: pamphlets and books on Euclid, an efficient way of calculating determinants, astute analysis of election methods, and systems of mnemonics and ciphers. Wilson also includes puzzles (some with unsatisfying solutions); a number of Dodgson's photographs, for which Wilson labels him “one of the most important photographers of the nineteenth century”; and humorous and satirical letters suggesting political postulates such as, “Let it be granted, that a speaker may digress from any one point to any other point.” Though Dodgson was apparently not always a brilliant teacher or writer in his field, Wilson chooses some of his best work for the examples, and any fan of Victorian mind-benders or mid-level mathematics will enjoy the Dodo's witty and eager explanations of logical puzzles and games. 100 illus. (Nov.)