If you want the book from 2006, it's available on Amazon.[1] Most of this material is available on line, from the National Archives or the University of California.[2][3] It's not new.

[1] https://www.amazon.com/Impounded-Dorothea-Censored-Japanese-... [2] https://www.archives.gov/research/alic/reference/military/ja... [3] https://calisphere.org/exhibitions/t11/jarda/