I found Miller's "The Pretender" rather engaging and enjoyed the pace of that book, so I actively sought another book from her. Unfortunately, Dearest Max was tediously dull. I found absolutely no reason for the two main characters, Max and Veronica, to have fallen in love in such a short time. The last time Max saw "Vee," she was just 12 years old, and within a couple of pages of seeing her again, he is desperately in love, as is she. I would say that if they had fallen in love and then renewed their love after years apart, the story might work, BUT she was only 12!
I can generally accept that characters in a romance novel are going to fall for each other rather quickly, without the same requisite experiences of real life, but there was nothing in this story that made me care very much about the characters much less give me reason to think they cared about each other. Add to that, there is supposed to be an aspect of mystery to the story, but the "truth" of the mystery was apparent well before the mystery itself was really revealed to the audience.
As much as I wanted the story to be good, I thought it was a rather tedious, slow read and I couldn't wait to put it down.