So i read this book at school in the earlier 00's and all I can remember is it's potentially set in a futuristic setting and this guy (maybe a private eye or just a finder of things) has this gift where he can go into people's minds or into a sort or dream world to find things or people. He may be trying to find a serial killer?
The only scene I vividly remember is in this dream world he comes across this grotesque baby like creature that is part of the (killer's?) soul or something.
Really vague description but I've been trying to remember for years and that's all I've got.