The Stevens catalog has to go to the printers by a specific time and as such they will sometimes list effects, books and videos that they have on order but are not in yet. If they didn't do that, they would miss the release date with their catalog and by the time the next catalog came out, the buzz about those new products would have dies down already. Most dealers that issue regular catalogs like Stevens face the exact same problem.
However, if you were to order the book through a dealer like Stevens Magic, as soon as the book comes into their stock, they would ship it immediately to you. I pre-order many things that way and have never had a problem.
Paul Alberstat http://www.stores.ebay.ca/abstagecraft