Holy Warriors is a book I have just finished reading by the eminent Historian Jonathan Phillips.
It is a wonderfully compelling read on the Crusades. It takes it right up to the present with current Crusade rhetoric in the Middle East.
It is a great introductory read and allows you to understand the Crusading idea and the medieval mind.
If offers an insight into great men of faith, honour and courage and other less favourable attributes.
Annyway I wholeheardtly recommend this book to anyone who has an interest in the era or wants an understanding of the Crusades.