I have only seen kits without a pattern one time but the kits were displayed around the book and if you bought a kit and the book you got a discounted price. There was a sign with the display explaining 1 kit and book something like 5% off, 2 kits and book 10% off. They had a kit for every project in the book.
I bought the just the book because I didn't particularly like some of the fabric in the kits and I wanted to make substitutes. In hindsight it probably would have been cheaper for me to buy a kit or 2 and the book and just substitute the fabrics. I never do anything the easy way :?
Sounds like you did better than I did :-)