Books like The Hollow Hills

Keeping watch over the young Arthur Pendragon, the prince and prophet Merlin Ambrosius is haunted by dreams of the magical sword Caliburn, which has been hidden for centuries. When Uther Pendragon is killed in battle, the time of destiny is at hand, and Arthur must claim the fabled sword to become the true High King of Britain.

Liked The Hollow Hills by Mary Stewart? Here's what readers who loved it picked up next.

The Mists of Avalon by Marion Zimmer Bradley (1982) · 4.12★
Taliesin by Stephen R. Lawhead (1987) · 3.98★
The Once and Future King by T.H. White (1958) · 4.08★
Anne McCaffrey's Dragonflight #1 by Brynne Stephens (1991) · 4.44★
Dragonflight by Anne McCaffrey (1968) · 4.1★
The Clan of the Cave Bear by Jean M. Auel (1980) · 4.02★
Excalibur by Bernard Cornwell (1997) · 4.38★
The Grey King by Susan Cooper (1975) · 4.18★
A Wizard of Earthsea by Ursula K. Le Guin (1968) · 3.99★
Wicked: The Life and Times of the Wicked Witch of the West by Gregory Maguire (1995) · 3.52★
The Fellowship of the Ring by J.R.R. Tolkien (1954) · 4.34★
Crocodile on the Sandbank by Elizabeth Peters (1975) · 4.02★