Book recommendations fro rammed earth building

Hi guys

Im recovering our (Taipa) rammed clay earth ruin here in the Algarve.
One wall has fallen down completely but the rest LOOKS ok.

Can anyone recommend a book that deals with this kind of building?
Im not keen to get a company involved and the rammed earth course was cancelled due to lack of participants.

Any advice would be great.
TKS :)
Sebastian