Shield and Sentinel: Observations on Warding Magic

The Shield and Sentinel: Observations on Warding Magic was a well-known book on magecraft and of particular interest to novice wizards. It was written by Alais Maeraphym, whom Elminster considered to be a warm and affectionate woman—a trait that found its way into this book's prose as well.

Contents
The book was considered mandatory reading for all practitioners of magic in the late 15 century DR. While it held no spells, it was well-written and provided its readers with half-spells and incantations that enabled a better execution of popular castings.

Availability
Due to its value, thieves' guilds and cabals would often pilfer it on sight.

A copy of the tome was found by Elminster in Candlekeep in the.