Cover Artist & Illustrators of Andre Norton's English titles
Castle, Philip
Sorceress of the Witch World ~ Tandem, 1970, pb, UK
Three Against the Witch World ~ Tandem, 1970, pb, UK
Warlock of the Witch World ~ Tandem, 1970, pb, UK
Web of the Witch World ~ Tandem, 1970, pb, UK
Witch World ~ Tandem, 1970, pb, UK
Year of the Unicorn ~ Tandem, 1970, pb, UK
https://andre-norton.com/special-sections/cover-artist/796-castle-philip#sigProId1c08a51904