Theravada Buddhism in Contemporary Sri Lanka" edited by Maeda Egaku - A great book for systematic study of contemporary Sri Lankan Buddhism!
Just as Japanese Buddhism is divided into various sects, each with completely different doctrines and manners, there are many differences in Sri Lankan Buddhism.
In this book, you can learn about each of these modern Sri Lankan sects and their origins in a systematic and easy-to-understand manner. This was a great help to me when I was confused.
This book is very valuable because it systematically summarizes the characteristics and doctrines of each sect in Sri Lanka, as well as Buddhism at the level of daily life of the people of Sri Lanka. It is very interesting to read it while comparing it with Buddhism in Japan, as it also explains in detail about funerals and daily prayers.