Written by Conn and Hal Iggulden ‘The Dangerous Book for Boys’ is a guidebook which is aimed at boys "from eight to eighty." Covering a range of topics of interest to boys, from catching rabbits to understanding girls, this book sold over half a million copies since its release on 5 June, 2006. The book is famed to have reached the number one position several times in the UK non-fiction charts. Conn Iggulden also published a book on Genghis Khan, Wolf of the Plains, which, along with The Dangerous Book for Boys, catapulted Iggulden to the position of being the first author to reach the number one spot in both the fiction and non-fiction charts.

The book got released in U.S. on May 1, 2007 and instantly reachd the number two position on the Amazon.com bestselling book lists, following Harry Potter and the Deathly Hallows. The dangerous book for boys won the Book of the Year award at the Galaxy British Book Awards in 2007. It was also the recipient of several design and production awards at the British Book Industry Awards. The editorial team consisting of Katie Espiner and Clare Hey, as well as Helen Johnstone, winner of the 2007 British Book Industry Award for best publicity campaign are the other people who have contributed equally to the success of this book.

Pocket books published a more portable form of the book, titled Dangerous Book for Boys: Things to Do in 2007. A few new activities, like the garden rocket too was added in this edition. The dangerous book for boys came out in the UK in September 2007, and has historical facts, seasonal activities and space to note your own adventures. The Pocket Dangerous Book for Boys: Things to know, is planned for release in the summer of 2008.