Simply titled “Barrett” this 2010 coloring book by Piper Gates Design can’t be found anywhere on web (at least not anymore, the listings were removed from eBay).
If you really gotta have one, I’d suggest contacting Piper Gates Design directly at this email address: email@example.com. Who knows? Maybe there are more?
Update: Ian Percival of Piper Gates Design wrote to DM to say: “The book was not removed from ebay but sold out of its original print run in 2 days.”