Same book, different edition?

[Lesli]

Amazon lists the following two books as the same thing just different format:

http://www.goodreads.com/book/show/26... (hardback)

http://www.goodreads.com/book/show/64... (book and paperback)

Barnes and Noble, however, treats the books as if they are completely unique.

Combine or leave separate? Thx!

[rivka, Former Moderator]

WorldCat confirms the latter is a revised edition of the former.

http://www.worldcat.org/title/it-star...