The Wonder Book of Invention, by Professor Low, published by Ward Lock & Co, size 7 & 1/2 x 10 inches, 256 pages not dated but looks 1930s. With Heath Robinson end papers and very well illustrated. A truly fascinating book with amazing photos - a "how it works" book of it's age, the steam powered robot photo & picture are amazing! - (see photos 8 & 9). Condition: All colour illustrations present, cover has some wear/stains/rubs/shelf wear, spine faded with small tear to edge of cloth, inscription, foxing, small mark to end inside cover (on Heath Robinson illustration), hinges cracked, otherwise binding tight