What is Wrong with You? by Paul Rudnick
I read this very funny book over the weekend called What is Wrong with You by Paul Rudnick. It's about a NYC editor named Rob whose beloved husband (Jake) died and he's still grieving. His long-time personal trainer (Sean) is still in love with his ex-wife (Linda). Rob's best friend (Paolo) thinks he's dating a stalker dentist (Dax). And Rob's new coworker (the snarky Isabelle) wants to fire him because he won't make her suggested changes to the manuscript of an up-and-coming writer (Tremble) that Rob discovered. They all end up on this private island, along with numerous celebrities, for the wedding of Linda and eccentric billionaire Trone (a man Isabelle is convinced is her soul mate despite never having met). The dialog is hilarious.