I think renaming the book is a bad idea. You have created your "Brand" around the name Random Acts of Reality. And I imagine most of the people who will buy the book are readers of your blog. It would be similar to the Coke/New Coke disaster of years ago, changing the formula just doesn't cut it. If the front cover has a photo/picture of an Ambulance on it, browsers will get the gist that the book is about Ambulances/The Ambulance Service. A quotes from the internets: "In general, the rule of brand naming is that if you already gave a strong brand name do not change it, if that can at all be helped. Researchers have found that established brand names have a great deal of brand equity locked up in them, and that changing brand names can lead to unhappy customers and a loss of business." Whatever you do don't change your well branded concept now no matter how hard the publishers push you...