Finding the Falling Man

Faye Dawson's adventure-seeking twin brother Drew is literally a man with a vision.
When he tells his level-headed sister a stranger is going to die because of him, Faye decides to turn amateur sleuth. Her aim: to save the day for both Drew's conscience and the man they come to call 'The Falling Man'.
How can they hope to find a specific stranger in densely-populated London and convince him his life is in danger? With the aid of pizza, the Internet and a fictional hamster, of course.
But what if the falling man isn't the only one in peril?
A thrilling murder mystery turned upside down and inside out, this is a story about choice, chance and fate.