Gernot Minke- Building With Earth : Gernot Minke : Free Download & Streaming : Internet Archive
This is one of the most complete handbooks on Earth Building readily available. The subject is covered from the chemistry of clays right, through testing soils for engineering suitability , to designing multistory dwellings.
Its accessible style and obvious practical background make it extremely useful for the home builder, government officer or Aid Project Manager.
Design assess or build an entire city :)