The site does not fill me with any confidence. It seems to be aimed at authors, the design is rather unattractive, there is no real information about the people who are running it, and they seem to have no real focus (i.e. books on hypnosis and self-help mixed with a novel? Also, one of the hypnosis books has chapters on telephone (okay) and instant messenger (?) hypnosis).
If you are considering them, I suggest caution.