I learned of these on a non-book forum and don't remember seeing them mentioned here recently, so pardon any duplication. The forum post didn't mention its information source, so there might be more books involved if anyone has an idea how to search for them.
Some odd points: when I follow the links, I get to a $1.99 page for the books I looked at. However, the "also bought" section on each page links to regular priced copies of the other books via URLs other than those below. I bought one for $1.99, but click carefully.
I looked a couple up at Amazon US and didn't see any matching prices.
The titles:
The Hobbit by JRR Tolkien
Life of Pi by Yann Martel
The Hunger Games- Book #1 by Suzanne Collins
Flight Behavior by Barbara Kingsolver
The Round House by Louise Erdrich (2012 National Book Award Winner- Fiction)
The Mark of Athena (Heroes of Olympus Series #3) by Rick Riordan
The Vow: The True Events that Inspired the Movie by Kim Carpenter, Krickitt Carpenter, and Dana Wilkerson
Heaven Is for Real: A Little Boy’s Astounding Story of His Trip to Heaven and Back by Todd Burpo