Good Civil War diaries are like treasure, they're hard to find and you have to sort through a lot of less valuable material to get to them. This book is definitely one of those treasures, though. Jackman's account is far from the usual one, being rare for his being a member of the famous Orphan Brigade, but also for his being an enlisted man. Not only that, but Jackman was more educated and literate the the average enlisted soldier of the time (he came from a relatively privileged background).
Jackman covers most of the actions of the Orphans, although he missed a few due to sickness or injury, with wit and clarity. While he's sometimes a bit more laconic that I would have liked, I found his account of his part in the war engaging and entertaining to read.