Some books on Japanese bantams that are available include:

The Japanese Bantam
Author: Terry Wible
Country: USA
Comments: A basic book with some good pictures of American Japanese bantams.

Understanding Japanese Bantams
Author: John K Palin
Country: UK
Comments: An excellent book and still available online and in second-hand bookshops. Now out-of-print.

Colour breeding of Japanese Bantams
Author: John K Palin
Country: UK
Comments: An excellent book but hard to find. Now out-of-print.

Japanese Bantams
Author: Anna C. Banning-Vogelpoel
Country: USA

Japanese Bantams
Author: Dr Joseph Batty
Country: UK

Higo Chabo
Author: Geert Coppens
Country: Netherlands
Comments: This book details the variety of Japanese bantams known as Higo Chabo. It is written in English, Dutch and Japanese. Hard to find.

The Chabo and its Breeding
Author: Choken Inagaki
Country: Japan
Comments: One of the most authorative books on Japanese bantams published in 1951. Very hard to find.

History and Australian Standard Japanese Bantam
Author: Gerry Coady
Country: Australia
Comments: Small self-published handbook with good information on Australian Japanese bantams. The standards contained within are not the official standards. Becoming hard to find.

Chabo
Authors: Manfred Bartl, Helmut Kroll
Country: Germany