The Big Kerplop was the only full length Mad Scientists' Club adventure ever published. Unfortunatly for MSC fans, it is very rare, as (I've heard) less then a thousand copies were printed. The plot centers around the accidental dropping of an atomic bomb (no, it didn't explode) into Strawberry Lake, the panic of the people of Mammoth Falls, and the eventual saving-of-the-day (and the lake) by the Club. Thoroughly enjoyable for anyone who has read the other two books. Consider yourself lucky if you've read it, let alone owned a copy.

[Editor's note: The Big Kerplop is back in print. All Scientists, rejoice! (2009) ]