John Watson, "The Sherlock Holmes Puzzle Collection: 150 enigmas for you to solve, inspired by the world's greatest detective" English | ISBN: 1862008728 | 2012 | 288 pages | PDF | 18 MB
Brain Activities for Seniors: Fun and Easy Puzzles, Memory Exercises, Brain Games and More to Keep the Mind Sharp (Keeping the brain sharp for elderly) by Phillip Willis English | 2023 | ISBN: N/A | ASIN: B0CCDZSJ19 | 75 pages | EPUB | 4.14 Mb
Memory Improvement Games: A Complete Workout with 50+ Memory Exercises & Games to Improve Memory by Puzzleland English | September 20, 2015 | ISBN: N/A | ASIN: B015NIAX28 | 262 pages | PDF (conv) | 5.21 Mb
The Great Book of Riddles: 250 Magnificent Riddles, Puzzles and Brain Teasers by Peter Keyne English | August 24, 2014 | ISBN: N/A | ASIN: B00N0VUN8U | 157 pages | EPUB | 1.16 Mb