Emm... well... it had nothing in common with the novel other than the title and a couple character names? Maybe that was it.
Ok, embarrassing moment... we have about three copies of all the "Harry Potter" books - hardcover, softcover, whatever, but we also have a complete set of "English" editions. That is, the version they sell in England. There are some minor differences... anyway, I was looking for the English copy of one of them, ransacking my siblings' shelves... only to recall that it was on my own shelf. Heh.
LOL! Sometimes I have a copy of something but I have so many other books I forget I have it, so I end up going to the library and checking it out, only to discover afterwords that I already had it :)