20 books — in reading order
Holy Island
LJ Ross
Sycamore Gap
Heavenfield
Angel
High Force
Cragside
Dark Skies
Seven Bridges
The Hermitage
Longstone
The Infirmary
The Moor
Penshaw
Borderlands
Ryan's Christmas
The Shrine
Cuthbert's Way
The Rock
Bamburgh
Death Rocks
