You can take help from the below 5 books on how to make formal shoes for men and women.
Handmade Shoes for Men by Lazlo Vass & Magda Molnar
The Art of Shoemaking by William H. Golding
Bespoke Shoemaking: A Comprehensive Guide to Handmade Footwear by Timothy J. Skyrme
Shoemaking by F. Y. Golding
The Secrets of Shoemaking by Francis Classey
You can also check out how to make formal sandals for office wear.
The Art of Sandalmaking by Larry N. Rowe
A practical guide dedicated specifically to making various types of sandals with clear instructions and illustrations.
The Barefoot Book: 50 Great Reasons to Kick Off Your Shoes by Daniel Howell
Includes basic sandal-making methods and minimalist sandal crafting for natural walking enthusiasts.
Leatherwork Manual by Al Stohlman
While it covers broader leather projects, it has detailed sections on crafting leather sandals, straps, and soles with traditional techniques.