Net-Book of Heretic presents a variety of items, options, and monsters for general campaign use. The materials presented are all derived from id Software's computer game Heretic (1994). While knowledge of the computer game will assist in making complete "sense" of the items in this netbook, the various items and options can be adopted piecemeal.
An interesting aspect of the book is the parallel presentation of most items with two versions - one for so-called "wimpy" rules, and one for so-called "power" rules. This allows the various items to be used in either a traditional or an epic campaign.