1. Borders by Design-Paulette Peters. I refer to this often. It's a comprehensive guide to creating beautiful pieced borders.
2. Around the Block with Judy Hopkins. 200 rotary cut blocks in 6 sizes.
3. Mariner's Compass Quilts - Judy Mathieson. How to draft your own compasses plus several beautiful patterns and projects. I own this, but it's still on my "To Do" list.