Sheldon tries to make friends
Stu the Cockatoo is New at the Zoo is a book Sheldon picked out at the library when trying to learn how to make friends.
The Book
"Stu the Cockatoo is New at the Zoo" was written by Sarah Carpenter and exists outside of the Big Bang Theory. Sarah Carpenter lives in Fort Wayne, Indiana. She lives with her husband and Mark, a friend of theirs. She owns cockatoos. Sheldon doesn't think that that means she is an expert in making friends.