This book is recommended by many leather craft people around the world, not just in USA. I purchased this off eBay as it was recommended to me by several You-tubers.
I can vouch that I am not disappointed, and rather relieved that several of my lingering questions on sewing leather have now been answered.
It is a soft bound book, with illustrations throughout, step by step diagrams with pictures. You cannot get it wrong. Very easily to follow.
Old or new, get your hands on a copy. Once you've worked through it, you'll have more confidence that you are sewing leather correctly.
This is an outstanding book. The sewing illustrations are great and the written description of the illustrations is clear and helpful. This book has become my most used reference book and never too far from my leather working projects.
this isn't cheap but it has absolutely everything you need to know, clearly described with lots of images, including proper vocabulary and techniques. You can't follow these directions and make crap, but you will put in time and effort because there's no shortcuts, just good solid craftsmanship with traditional, time honored methods. If you are new to leatherworking, or you are experienced and want to improve your game, this is the book you need.