I likely do as well, I just know I don't have an autograph on all volumes. I also would like an autographed copy of his wife's books on dolls. I have one of Janet's but not autographed. They show up less often than his.
Her first was, The Fascinating Story of Dolls. Johl, Janet P. Published by H. L. Lindquist, New York, 1941. Followed by Still More About Dolls, Johl, Janet P., Published by H. L. Lindquist Publications, New York, NY, 1950
Interesting who the publisher was for both.
Also he dedicated books to her, but she did not do so for him. May have been the subject matter.