Railsea by China Miéville - Limited Signed Slipcased Edition

I just pre-ordered my copy of Limited Signed Slipcased Edition of Railsea by China Miéville and I'm very excited about it. "High expectations" anyone?

Please correct me if I'm wrong but I think only The Book Depository is running such a deal:

Railsea: Limited Signed Slipcased Edition