This is, essentially, "The Baffle Book" with a number of elements changed over to English usage; it was originally published in 1930, and this particular edition is the 1984 reprint.

The first of three volumes that came out in the late 1920s and early 1930s that presented a series of mystery puzzles for a reader to solve, with the solutions in the back. Even at a distance of 90 years or so, the puzzles are still a lot of fun, though some puzzles are very dated. (For example, to guess where a kidnapped person had been taken, you have to know what papers would have been on sale in the Philadelphia and Baltimore of the era; another one requires tire-track knowledge lost to time). The illustrations are crude, but effective. Still a lot of fun to read, and the best of the series.

not too baffling ( )