The best selections from the 4-Hour Workweek Forum. To quote Tim,
"The 4HWW Forum was vibrant for years, a repository of great lessons from readers, until it became simply too buggy. It’s now read-only, but I’ve curated the best material and put it all into a 428-page PDF, complete with a Table of Contents."
The contents are the subjects covered in The 4-Hour Workweek, in order. It's basically the forum's users expanding on The 4-Hour Workweek.