DKM has published a number of paperback books of various puzzles for those that would like to solve puzzles the old-fashioned way with a pencil and paper. The books can also be useful when you don't have an internet connected device available or maybe as a gift for those that do not have a computer.
The following books are available exclusively from Amazon. The links to the books will take you to the USA Amazon website. Please substitute amazon.com for your local Amazon site if you live in the UK, Canada, Australia, Germany, France, Spain, Italy or Netherlands.
If you purchase a book, a review would be appreciated.