Room, by Emma Donaghue - Book Trailer
Author's website - includes other books.
Read about it in LitLovers.
In The New York Times: A captive's view of life, and he is 5.
In The New York Times: Separation Anxiety
The Guardian - review
The New Yorker: Emma Donoghue chats about "The Room"
NPR: In Donoghue's Room, a Child's World of his Own
In The Economist - Questions & Answers