These links are to books in the Internet Archive (archive.org)
1966 Edition of Yacht Racing Rules and Tactics by Gordon C. Aymer https://archive.org/details/yachtracingrules00ayma
1993-96 Edition of Paul Elvstrom explains the Yacht Racing Rules https://archive.org/details/paulelvstromexpl00sore
1989-1993 Edition of Understanding the Yacht Racing Rules by Dave Perry https://archive.org/details/understandingyac00perr
1985-1988 Edition of The Yacht Racing Rules: A Complete Guide by Mary Pera https://archive.org/details/yachtracingrules0000pera
1981-1984 Edition of The Rules Book by Eric Twiname https://archive.org/details/rulesbook198100twin