Police in the US are both investigating and protecting the author of a guide for paedophiles.
Phillip Ray Greaves II, of Pueblo, Colorado, has drawn national attention because his self-published book was for sale on the Amazon website.
The book offers advice to paedophiles on how to make a sexual encounter with a child as safe as possible.
Amazon is no longer selling the book but it is not clear whether the company or Greaves removed it.
Amazon was not available and the author declined to comment.
A local newspaper, The Pueblo Chieftain, reported today police have not found anything to indicate that Greaves has committed a crime but will monitor him.
Police said threats have been made against Greaves and they are watching him to protect him.