Half-Square Triangles & Beyond Volume 1 is the ultimate reference book of 35 techniques for HST, HHST, Y-Blocks and Topsy-Turvy Triangles units contains step-by-step instructions and cutting amounts for each in sizes ranging from 1" to 12" finished! You will also learn how to identify the type of unit you need to make and choose the technique that suits the block best. Know the advantages and disadvantages of each technique before you sew and know which unit size will fit a particular pre-cut.