The Collegium Chronices by Mercedes Lackey

Foundation by Mercedes Lackey - 340 pages
Intrigues by Mercedes Lackey - 328 pages
Redoubt by Mercedes Lackey - 330 pages

The Collegium Chronicles

This is one of my favorite series.  I try to re-read it every few years.  It tells the story of Mags and his times training to become a Herald of Valdemar.  He also trains in espionage to protect his country and friends.

Redoubt by Mercedes Lackey

Redoubt by Mercedes Lackey  330 pages

Mags, a young Herald trainee in Haven, the capital city of Valdemar, has very rare talents. Recognising this, the King's Own Herald trains Mags as a spy, tasking him with uncovering the secrets of a mysterious new enemy who has taken an interest in Mags himself. Why is an even deeper mystery. The answers can only be found in the depths of Mags' past, if he survives long enough to find them.