Below the Temple Mount Jerusalem is a must read for anyone interested in knowing details of the substructures of the Temple Mount. Since no recent archeology can be done here, and the site has new unsupervised constructions, this is the only source book for this knowledge.
The book is very dry reading, which is to be expected since its dimensions, ceiling type, etc, have to be dry statistics and this book is truly for a niche market.
A few technical problems are being addressed. There are few books written on this subject and this should be one for your library.