Page 216, The code for playing cards ...: the intended meaning of the suits (clubs and spades) given and the explanation (well and very well) in the text contradict each other.
Page 238. Fig. 9: the illustration may have been printed upside-down (cf. Fig. 10 and the text).
Page 295, various combinations of wines and liquids: as printed in the source document. Possibly an error for wires and liquids.
Page 458: It is not clear why One-blank is not listed.
Page 522, Figs. 7 and 8: The illusion “the standing pins” may not work in all formats; the bottom part of Fig. 8 has been added because it may be impossible to see the solution according to the directions given when reading this e-text.
Changes made
The (single) footnote has been moved to the end of the chapter.
Some minor obvious typographical and punctuation errors and misprints have been corrected silently.
Page 65: emotional parts of thumping changed to emotional parts or thumping.
Page 214: closing bracket added after the last two responses by the professor.