Starting soon, Crown Publishers will publish select paperbacks with expanded end-of-the-book insight into the writers of those books and the ideas behind those books. The program, called Extra Libris, features 16 pages of extra content, like Q&As with the book’s writer, author essays, and readers’ guides. Extra Libris isn’t too noteworthy in and of itself – various publishers have been experimenting with end-of-the-book content recently – but the three inaugural books Crown has selected for Extra Libris are proof the publisher knows exactly what it’s doing with Extra Libris. Quiet: The Power of Introverts in a World that Can't Stop Talking by Susan Cain (at left), The Expats by Chris Pavone, and I Am Forbidden by Anouk Markovits are excellent choices to start the program off – books whose subjects tend to elicit sustained interest from readers after they’re done with the book’s original content (we gave a rare starred review to both Quiet and The Expats) and the writers of all three books are debut authors readers want to know more about (Markovits had wrtten in French before but I Am Forbidden is her English-language debut). The Expats will be on sale January 22, Quiet on January 29, and I Am Forbidden on February 26. Extra Libris content will also be available in the digital versions of the books selected for the program.