I've often heard about the Linear B mystery and its final decipherment, but never in so much detail. That was fun. Now, when will there be something similar for the Iberian language...
Later books did a much better job shining a light on Ventris' collaborators, in particular the scientifically far more rigorous Alice Kober (e.g. The Riddle of the Labyrinth), but I will never forget reading Chadwick with 14, or thereabouts, and feeling profoundly affected. A formative read, even if the actual state of science on Linear B is quite a bit more complicated!