Cool video of a great Titanic build, Peter. I haven't built that one, but Currell's airships enlarge quite nicely.
I just did an Amazon search and found 2 Titanic book/models out there. One seems to be the same as B&N has (size not stated). The other, a Taschen, seems to be available, but out of print. A commenter says it's 54" long. Wow.