2. A Study In Scarlet, by Arthur Conan Doyle
3. Un Lun Dun, by China Mieville
As recommended to me by nextian.
I absolutely *loved* this book. Echoes of Neverwhere, Pratchett and Jasper Fforde, and jam-packed with ideas. It's aimed at the YA market, but don't let that put you off. A cracking read.
caitirin and boliviafang, I particularly think you two would enjoy this.
I give it 9/10