Start with high-confidence illustration books, then narrow by subgenre or adjacent topics.
Creative Haven Norman Rockwell Classics From the Saturday Evening Post Coloring Book
Norman Rockwell, Sara Jackson
The Book of Kells
Bernard Meehan
J.c. Leyendecker
Laurence S. Cutler, Judy Goffman Cutler
Needlepoint: a Modern Stitch Directory
Emma Homent
Zakka Embroidery
Yumiko Higuchi
The Art of Fallout 4
Bethesda Softworks
Crochet Stitch Dictionary
Sarah Hazell
The Ohno Book
James Edmondson
House Industries Lettering Manual
Ken Barber