I research Canadians who served in the American Civil War and have created several eBook files that are available for Kindle. The links below are for Amazon Canada - the ASIN below the link can be used to search the Amazon catalogs of other countries.
More files will be created in the near future. Topics will include Edward P. Doherty, the man who commanded the cavalry detachment that tracked down Lincoln's assassin; and the short-lived New York British Regiment.
Purchasing these files - even if you are not directly interested in the topic - will help support further research and history/genealogy-related initiatives (such as contributing to find-a-grave).