Leonard Hofstadter: I'm starting a book.
Sheldon Cooper: That would be big news from Penny, but you've read a book before.
Penny Hofstadter: He means he's writing a book.
Leonard Hofstadter: I do. It's something I've been thinking about for a long time.
Penny Hofstadter: Yeah. It's about a brilliant physicist who solves crimes using science.
Sheldon Cooper: Oh, Leonard...
Leonard Hofstadter: It's not about you!
Sheldon Cooper: He probably has to say that for legal reasons.