This eBook contains 50 puzzles or riddles with their solutions. The puzzles are brain teasers that require insight to solve but not brute force. Some of the puzzles rely on common sense only. Others are AHA or GOTCHA puzzles that Gardner loved. There are many puzzles that rely on lateral thinking while some require intense logic to resolve. Attempts were made to move away from commonly available puzzles while including uncommon puzzles such as cross numbers and puzzles extracted from real life situations.
The intended age bracket is from early teens onwards.
For those that require doodling with pen and paper to solve, the author has uploaded a PDF file to his site (www.marginalbooks.com) that can be freely downloaded.