Twin Effect by Ann Somerville
Approx. 37,910 words.
Published on April 5, 2013.
Dylan engineers artificial limbs like the one replacing his right hand. Moving to take up a new job after other life changes has left him lonely and disconnected, so fun-loving Max crashing into his life is a welcome change.
But Dylan discovers Max and his beloved twin Toby share a dark secret, and must help them navigate a new, uncertain reality without breaking his own heart in the process.