Amish-English sleuthing duo Deborah Yoder and Callie Harper set out to solve a murder. But more than an innocent man’s future is at stake. In book two of the

This textbook provides an introduction to the mathematics on which modern cryptology is based. It covers not only public key cryptography, the glamorous compone

Understanding Mathematics is a carefully written series of mathematics to help students encourage the study of mathematics in the best interactive form. It cont

Targeting Mathematics series consists of nine textbooks; one for Primer and eight textbooks for classes 1–8. These books have been formulated strictly in acco