From publisher blurb:
More Magic Items Than You Can Fit in a Bag of Holding.
Within this tome you'll find over 1,000 of the best magic items created for the Dungeons & Dragons game, including hundreds of new low-cost items. In addition, this supplement contains rules for augment crystals, which grant new abilities to existing magic items, and item sets, which provide collection benefits when you have all the items in a set.
This tome also presents new and improved rules for item creation, an updated treasure generation system, and more!