Few days ago I literally bumped into this great book store, Indosiam. The owner, Mr Azémar, will be glad to guide you through his unique collection of rare books and prints on Asian countries and former French colonies.
He has started ten years ago and he still has the only book shop of this type in the busy Hong Kong. If you like travel and exploration, history, geography, ethonology, art, and archeology, this amazing place is worth your time. The shop is at 89 Hollywood Road, Central, Hong Kong.