Dr. Boli’s Handy Table of Computations. Every number in the world added to, subtracted from, multiplied by, and divided by every other number, with complete operations shown, for the benefit of students of mathematics. The largest and most comprehensive work of its kind. Now available: Vol. 1, “1, Part 1.”

Dr. Boli’s History of the Yawn. A well-documented and exhaustively researched history of notable yawns, written in such a way as to inspire the reader to imitate those great examples. “The only sovereign cure for insomnia”—Sun-Telegraph.