A review by humatariq
The Sign of Four by Arthur Conan Doyle

5.0

SPOILERS Ahead. Consider yourself warned!!

This is one of the few full length Holmes novels; though if I remember correctly, it was quite short. Read it for the first time from my school library and loved it. I think this is the one with secret rooms which Holmes figures out using simple mathematics. I think there was also some sort of trigonometric reference to finding the location of hidden treasure with the help of the shadow of a tree.

What I do remember was that there was a map of the house Holmes was investigating and I drew my own version of that map on a piece of white cotton. Later I tried to make my parchment age a bit by burying it in the garden and some other tactics that I do not remember now (on hindsight, now I know why I like watching White Collar so much).