Alvin's Secret Code

The 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, is the reason why! Alvin's sixth sense tells him that the crumpled note holds a secret message in spy code, which is about to catapult the two secret agents plus Alvin's younger sister Daphne, the Pest, into the intricacies of authenti...