Junior

Smiling Jack by Ken Catran

Robert's world is shattered when his father and uncle are killed in a car crash. A playing card displaying an evil grin is found at the scene of the accident but disregarded until the third death ... and the fourth. Robert realizes he never knew his father - and as friends and neighbours turn against him, he is forced to look deep into the shadows if he is to get out alive. A classic whodunit.

Senior

House Rules by Jodi Picoult

Jacob has an obsession with forensic analysis and an abnormally high IQ but he also has his clothes sorted by the colours of the rainbow and can't look people in the eye. Jacob Hunt has Aspergers Syndrome.

When Jacob's social skills tutor is found dead Jacob is accused of murder. The symptoms of Aspergers can look a lot like guilt.