This book helped me make the most of the different stitches, feet and accessories for my sewing machine. I was even inspired to go out and buy more feet!
Format is around 2-5 pages on each technique, with a recipe format: Machine setup list includes: stitch, presser foot, needles, threads and tension. This is followed by recommended fabrics and additional supplies required. Clear instructions with photographs are provided, with a picture of the finished article at the end.
Similar inspiration for an overlocker: Serger Secrets, edited by Susan Huxley. Secrets for Successful Sewing is also very good, with tips for sewing machines and sergers - especially good advice on how to substitute different feet to create the same effect.