Taunton Press-Lucky Spool Books: The Half-Square Triangle. The workhorse of a quilt block is the half-square triangle: a simple block that creates intricate and beautiful results. Several methods for making and designing your own quilts offer new inspiration and forgo complex piecing work. Author: Jeni Baker. Softcover; 128 pages. Published Year: 2015. ISBN 978-1-940655-16-1. Made in USA.