Lasseter personally directed and co-wrote the story for A Bug's Life, Toy Story, Toy Story 2 and Cars.
He was the executive producer on Findiing Nemo, Monsters Inc, The Incredibles, Ratatouille, Wall-E and Up.
If you haven't see "The Pixar Story" which is included on the Wall-E DVD and available from iTunes Store, it's well worth it. It explains how Lasseter pretty much saved Toy Story 2 from Disney. Also there are good bits in there about Steve Jobs buying the company and playing hardball with Michael Eisner. I believe it also explains Lasseter's emotional attachment to Disney (One of his first jobs was on the Jungle Cruise at Disneyland, etc), but that may be one of the Pixar books I'm thinking of.