warm, tingly feeling that had been smack in the middle of Alvin
Fernald’s stomach ever since Miss Peppersmith had closed and neatly
lined up her books that Friday afternoon, had grown bigger as he and
Shoie walked home from school. Now, here, in his hand, was the reason
why! Alvin’s “sixth sense,” which clearly indicates that the crumpled
note holds an unmistakably coded message, is about to catapult two
seventh grade secret-agents-turned-cryptographers (plus Alvin’s younger
sister Daphne,“the Pest”) into the intricacies of authentic code
detection and the dangers of a newly stirred-up 100-year-old mystery.
Even Alvin’s “Magnificent Brain” is nearly put on overload before the
bang-up solution to the code and the mystery carry the three agents to
an ending that is satisfying to all…well, to almost all.
This reprint of a classic favorite includes Alvin’s own notes on cryptography in an appendix at the back.