I remember this as being my clear favorite of all the Three Investigators books that I read. Definitely had more than it's fair share of racist depictions, but the mystery was solid and it had a satisfying conclusion.
The Three Investigators mysteries were like a slightly more mature version of Scooby Doo. I know I read a bunch of these books when I was young, but this is the only one that I specifically remember. They were quite entertaining (though I think I preferred the Hardy Boys), but they struck me as a bi...