Victor Kalin

Title: The Doctor
Author: Mary Roberts Rinehart
Publisher: Dell
Published: Oct 1966, ©1935
Illustrator: Victor Kalin

He is credited on the back cover.

Innocence began and ended with Katie Walters. She was a child-woman--young enough to want things her way and old enough to know just how to get them. Dr. Chris Arden didn't know about Katie when he opened an office at the Walters house. But soon he learned she was to be only one of the many dangers destiny had planned ...