Actually, there are a couple of autobiographies of DOs out there. The problem is that they are usually pretty rare and therefore not readily available for purchase. In addition, the physicians writing them have all retired and therefore the experiences they had don't compare to what the rest of us will experience in our lives.
Anyways, three books I have on my shelf are:
YOU MUST BECOME A DOCTOR by Carl Moore Cook, DO. This is the story of an osteopathic physician, from PCOM I believe, that went overseas and setup a practice in England.
A DREAM AND AN HONOR by Alan J. Snider, DO. This is the story of another PCOM graduate who went on to build an osteopathic hospital in Largo, Florida (now Sun Coast Hospital).
REMINISENCES OF A COUNTRY DOCTOR by Charles L. Judd, DO. Judd was a KCOM graduate that practiced in rural Missouri most of his life and these self-published book includes some of his experiences.
These books are interesting snapshots of early osteopathic training, but for the most part I'd stick with the more contemporary books regarding experiences in medical training. BTW, the book EMERGENCY by Mark Brown, MD was published in 1996. It is a compliation of ER stories by different physicians and many of them are DOs. This book should be at most bookstores.
Good luck.