If you're a hand-quilter, Jinny Beyer's "Quiltmaking By Hand" is essential and will see you from the basics through to fairly skilled quilting.
The "Better Homes and Gardens Complete Guide to Quiltmaking" is an excellent all-round book, fairly encyclopaedic in nature, beautifully illustrated, lots of techniques for both hand and machine quilters in it although it does have a few errors in it (e.g. tables for calculating QST sizes and similar are sometimes completely off), so watch out for that.