If you’re looking for a true soils text to take you beyond casual gardening knowledge and into the world of soils meet in the mixture of geology and microbiology, this is the book for you. Accepted as the textbook for rigorous undergraduate soil science study, this one goes in depth in the science of the field and…leaves no stone unturned!!! (snicker)

The Nature and Properties of Soils (15th Edition)
by Ray R. Weil and Nyle C. Brady
Available on Amazon