This is an excellent book for anyone interested in the history of Hong Kong and the San On district. I've learned a lot about the origins of Sham Shui Po, Mong Kok, Tsim Sha Tsui, and other small villages on the Kowloon side. I found the descriptions of the temples and their locations particularly fascinating, even though they are now hidden amid the urban landscape.
The book also covers the development of Lantau, Sai Kung, and Cheung Chau, as well as the salt trade and stone quarries in eastern Kowloon. While the research is extensive, it can sometimes make the book challenging to read for someone like me who isn't an expert.