The time for book reading to "save the marriage" is long gone, believe me. Once they reach the walkaway point, they're done with the marriage, and want nothing but to be out of it and away from us. It's the nature of the beast.
//How can someone tell you they love you one day and the next send you a text message that they our miserable and our moving on with there life.//
Again, it's the nature of the beast. She'll also have momentary breakdowns, where she shows herself to be a pitiful, sobbing, wavering, confused person. Doesn't mean she won't snap back to "I-NEED-A-DIVORCE-MODE" as soon as she regains composure.
DB isn't intended for the walkaway spouse. It's intended for those of us left behind, and isn't necessarily the answer to resolving all of your marital conflicts. It's about rebuilding US AND MOVING ON, with or without the wayward.
It just so happens that the same things that make us better, stronger, more put-together people are about the ONLY chance to have a chance at reconciliation with our wayward.