Advancing On II technique book

Advancing On II...the main workbook for the Square in a Square system and contains the first 17 Options.  Jodi says this is the first book you should purchase and is called a "Must Have" book.  It also contains 15 quilts given in 60 block sizes and has 27 charts.  Additionally, the book has 51 pages of pattern adapting information to turn most any quilt into a Square in a Square quilt. You will refer to this book often as it contains so much helpful information.