Part 1 of Mary Stewart’s classic retelling of the legend of King Arthur, told through the life, eyes and visions of Merlin.
The Crystal Cave covers Myridden Emrys’ childhood as the bastard son of a Welsh princess, and his teenage years in Brittany with exiled British princes Ambrosius and Uther, where they bide their time and train their troops until the time is right to return to Britain and reclaim the throne from Vortigern.
Fantastic stuff. I’ve got volumes 2 and 3 out of the library already.
Publisher page: The Crystal Cave – Mary Stewart