I found out that it's quite hard to find an engaging Sherlock Holmes book. Most authors use SH only as a platform for the introduction of their own Mary/Marty Sues and twist Holmes and Watson into a pretzel to fit them their OCs (Laurie R. King, I'm looking at you) or they make Holmes a bastard and Watson an idiot (like Val Andrews did in "The Torment of Sherlock Holmes").
But I love books that focus on Holmes and Watson's relationship or show it in a very unusual, intriguing way. So far, the best books I've come across are Anthony Horowitz's "The House of Silk" - a wonderful, wonderful example of what Holmes and Watson's friendship should be like! - and Neil Gaiman's "A Study in Emerald" - which made me crave to find out more about Holmes and Watson of that world!
So, would you be so kind, my dear fellows, and rec me a book you particularly liked? A book that you felt showed Holmes and Watson's friendship in a wonderful light? An author who really "got" Holmes and Watson?