Standard Deviation by Katherine Heiny

Graham is married to Audra and they have a special needs son, Matthew. Audra talks to everyone and welcomes most everyone into their home (even the doorman when he needs a temporary place to stay). Audra is so friendly that she even befriends Graham's ex-wife, Elspeth.

Quirky, funny, and tender. Don't expect too much plot and closure from this book. The fun of it is in meeting all of the characters that come in and out of Graham and Audra's apartment.