I recently celebrated my 141st birthday (it's a joke) and my mom gave me these three books.
Tips for Quilters explains mitered corners better than any book I've ever seen. A very handy book that covers everything from selecting fabrics to removing spots. Some of it is just common sense, but some is just down-right funny.
Fat Quarter Small Quilts contains 25 projects. I like small quilts. These are all less than 3 feet x 3 feet.
Quilt Block Leftovers is my favorite. I always have at least one block left over and often find one or two blocks at estate sales or thrift stores. Now I have no excuse for not bringing them home with me.