The Ashford Book of Weaving for the Four Shaft Loom by Anne Field

The Four Shaft Table Loom
Yarns
Planning the Warp
Warping the Loom
Weaving
Patten Drafting
Balanced Plain Weaves
Twills
Weaver-controlled Weaves
Weft-Faced Weaves
Pattern Drafting (stage 2)
Overshor Weaves
One-shuttle Weaves
Double Weave
Summer and Winter, Crackle Weaves
Clothing Fabric
14 Weaving Projects
And so to the future
Glossary
Further Reading

At 175 pages, this is a substantial book and an excellent guide for owners of four and eight shaft looms, beginners and improvers. It contains instruction from first steps to advanced techniques, and 14 projects that put into practice the techniques covered.

I used a copy of this book when I made the step from a rigid heddle loom to an eight-shaft loom. It is quite a learning curve to make and thread a warp, read a pattern ('draft') and then weave with multiple shafts, but Anne Field guides you through all of this well. If you have more than four shafts, then starting out using just four of them is a complex enough task. Having mastered that, using more shafts is a natural progression.

I'm still dipping into it now as a reference, and there are many techniques here that I'm keen to try.