Investigating the Three Investigators

My "attic find of the month" is a box of my old books: The Three Investigators Mysteries by Robert Arthur, William Arden, and M. V. Carey. I really enjoyed these as a child and am passing them on to my son. Even during the short period of time when I acquired these, in the 1980s, I managed to get some from 4 different printings which we show in this video. Unfortunately the newer printings seemed to drop the Harry Kane illustrations and inclusion of Alfred Hitchcock. I remember them being very suspenseful and they may help out with reading and logical thinking skills. Not having looked at these in about 30 years, I was surprised to find they have increased in value since they are no longer printed.