If you like hanging around old bookstores, you will almost certainly come across canning recipe and technique books from all ages. They are definitely worth looking through and buying for the recipes.
Fair warning: the canning/preserving techniques in older books are very strongly not recommended. If you follow these old techniques you run a serious risk of sickening – or worse – those nearest and dearest to you. Use the recipes for guidance and inspiration, but ONLY use the USDA recommended methods of preservation.
USDA canning and preserving pages are here
Public domain books at the Internet Archive are here – remember, recipes only!