Looks like a neat book. Build Your Own Earth Oven is a simple, fully-illustrated handbook for making a wood-fired, masonry-style oven out of inexpensive earthen materials (similar to adobe and cob). The book provides clear, step-by-step instructions for building and firing the oven, as well as complete directions for making sourdough bread in the best (and simplest) artisan tradition. Link.
Build Your Own Earth Oven