The Horse Industry Handbook (HIH) is updated periodically with the updated sections being sold separately from the complete publication. If you already have a copy of the HIH, you need to purchase an update in order to have the most current information. If you do not have an HIH, you should purchase the full handbook rather than individual updates.
 
The 2021 update includes new and revised content in Chapter 1 Introduction to Horse Ownership, Chapter 2 Selection and Use and Chapter 11 Tack and Equipment.