The Madge Sterling series, written under the pen name of Ann Wirt and published by Goldsmith, was a short breeder set that unfortunately went no farther. This was a good series that Millie wrote, combining mystery, light romance, and adventure. The last book in the series, The Secret of the Sundial, was the best of them all. These were shorter books than most at the time, at only 15 chapters. The boards range in color from red to blue to brown. Madge, whose mother is deceased and her father strangely missing, lives with her aunt and uncle. Madge likes the outdoors and has a talent for solving baffling mysteries:

• volume #1 The Missing Formula 1932
• volume #2 The Deserted Yacht 1932
• volume #3 The Secret of the Sundial 1932