Wayne,
You own the book, the physical book. You however do not own the contents, this belongs to the publisher and the artists which have released control to the publisher. While most circumstances will allow you to use the patterns for reasonable use. There is an issue of how many of the item can you make from the pattern and have it still considered reasonable use? Some folks like myself allow someone to use my pattern all they wish as long as they give credit were the pattern came from, others are not so reasonable. It is always a good thing to contact the designer to get written permission if you plan to do a lot of sales of the item made from that pattern.
DW