To explain why Angel City (1994) is a disappointment, I need to mention that there is a continuous series of 13 Angel novels dating from 1989 up to July 2008, and that within them there are some very interesting characters who appear and reappear.
Angel (Fitzroy Maclean Angel) is a bit of James Bond character; he lives a rich and varied life.
He has a fantastic menagerie of housemates in Hackney.
He works with a strange and diverse group of "detectives" in Shepherds Bush.
His family is as eccentric as you can imagine.
He deals with dodgy characters all over the place and many of them owe him favours.
Angel City, though, is a disappointment because of the thinness of the plot. (And it's also implausible, but when was that a serious fault?)
Here, Angel spends most of his time acting as a delivery man, driving round London in his deregistered taxi. Then he gets caught up in a scam with a jumpy teenager, Tigger. When the lad disappears, Angel is paid to find him. This involves infiltrating an underground Dungeons & Dragons setup (nothing to do with computers) and trying to work out who is doing what to whom.
Storywise, there isn't much about his housemates, nothing about his family, and his career as a detective doesn't kick off until the next episode, Angel Confidential, which is a much better caper. As I say, Angel City is a bit thin.
On the positive side, I could just see this novel being filmed ahead of the others: the simplicity and directness of the plot would make it an excellent action movie. And in any case, I think Mike Ripley could well become the Next Big Thing - the Angel novels as a whole are a source of interesting characters and believable situations.