Most biological thrillers tend to be full of exciting chases, where the lead character is hunky, fit and gets the girl as well as finds a cure for mankind. This is the opposite. Ludmilla's a dumpy middle-aged woman (or at least she's dumpy in my imagination) who just cares about her patients and her wayward daughter. This doesn't make it a lesser book, it makes it a welcome change.
George Hamilton writes a very good story. He makes the characters believable even though they are a long way from what you know.