The Rosie Project by Graeme Simsion
I can't urge you to read it strongly enough.
This story is a thoroughly enjoyable rip-snorting read. It made me giggle and ponder, and cry at the end. It's a fascinating study of square pegs trying to fit into round holes, and a topic particularly close to my heart, which is the idiosyncrasies, practicalities and depth of those on the autism spectrum.
This story touched me deeply and tickled my funny bone.