The boys are very into dinosaurs at the moment so I made a point of finding dinosaur related books this trip.
Dinotopia (not really read aloud material but they like looking at the pictures)
Here Comes T Rex Cottontail
T. Rex Trick or Treats
Pterosaurs: Rulers of the Sky
They Lived With Dinosaurs
Dinosaurs Before Dark (bookmooch)
plus some non dino books
Wind in the Willows (bookmooch)
Frog & Toad Together (bookmooch)
Tack & the Winter Games
Lyle at the Office
Lyle at Christmas
I'm mooching the longer books from my read aloud recommendation lists, that way I am under no pressure to return them to the library by a certain date. We breeze through the 30 page books pretty quickly, reading 3-5 in one sitting sometimes, but they are not always willing to sit still for the longer ones.