Exploring canning and preserving. Not so much a "how-to" as a philosophical exploration.

USDA preservation guidelines:
https://nchfp.uga.edu/publications/publications_usda.html

The Ball Blue Book can be found in lots of places. This is just one:
https://www.lehmans.com/product/ball-canning-blue-book

Perfect Preserves: Provisions From the Kitchen Garden, by Norah Carey is out of print.

Mes Confitures: The Jams and Jellies of Christine Ferber, is published by Michigan State University.
https://shop.msu.edu/products/prs-09

Mrs. Wheelbarrow's Practical Pantry, by Christine Barrow:
https://wwnorton.com/books/9780393240733

River Cottage Preserves, by Pam Corbin