This clear and concise advanced textbook is a comprehensive introduction to power electronics. It considers the topics of analogue electronics, electric motor control and adjustable speed electrical drives, both a.c. and d.c. In recent years, great changes have taken place in the types of semiconduc[...]

This omnibus edition brings together Phillip Keller's three devotional classics, A Shepherd Looks and the 23rd Psalm, A Shepherd Looks at the Good Shepherd, and A Shepherd Looks at the Lamb of God.As a shepherd, Phillip Keller knew what it was to protect a vulnerable flock on a daily basis. The spec[...]

An Apology for Poetry (or The Defence of Poesy), by the celebrated soldier-poet Sir Philip Sidney, is the most important work of literary theory published in the Renaissance. The new introduction and notes include a wealth of new information and new readings drawing on recent developments in Renassa[...]