I enjoy my Bobby Flay books as well. If you like Mexican, get a Rick bayless book as someone else suggested. The recipes in his 'Mexican Everyday' book are very easy to make on week nights....it changed the way I cook at home, literally. I also enjoy his Authentic Mexican.
Do you have any Thomas Keller books? Ad Hoc At Home is a good one to start with before picking up The French Laundry.
Modernist Cuisine books would also be a good choice. Focus more on books like this to become a more rounded chef, instead up buying a half dozen BBQ books that are all nearly identicle.