FYI: From the author's newsletter. (Note: This is for the revised, second edition of the reference book):

If there’s a pinball lover on your gift list (or if you’d like to treat yourself to a special gift), we are offering our once-a-year Christmas special: Personally autographed copies of our best-selling guidebook Pinball Machine Care and Maintenance.

Every book ordered directly from us between now and Christmas will be autographed by the author, BB Kamoroff. If you want a personal autograph, when you order let us know how you would like it to read, and we’ll ask BB to add a special greeting for you. Order on our web site www.AboutPinball.com or by phone 707-459-6372.

I placed an order for an autographed book myself.