Upfront, I have NO financial ties to this, I'm just helping spread the word.
Jim Hand's original book has been out of print for a long time, and greedy people were charging stupid prices for copies. Some people asking several hundred dollars!
Jim's son, Tom, saw the price gouging and wanted to do something about it. He got the rights to the book, changed the title slightly (to NOT be confused with Rocky's book), and sat down with Jim to correct some old typos and such.
Not drastically different than the original, but it has some QR codes added that link to videos, and a few things like that.
BOP Engineering is now the sole source for selling the new copies. It is the 3rd book down from the top, on this page:
https://www.bopengineering.com/books.shtml