Dell Publishing did a whole series of mapbacks https://www.flickr.com/search/?text=dell%20mapback Reply
No signature, probably S.B. Jones, painting here : https://www.comicartfans.com/gallerypiece.asp?Piece=647459 Reply
This book has a mapback, like Ladies in Hades.
Dell Publishing did a whole series of mapbacks https://www.flickr.com/search/?text=dell%20mapback
No signature, probably S.B. Jones, painting here :
https://www.comicartfans.com/gallerypiece.asp?Piece=647459