Zombie Cows!

Secret agent Amelia Kidd has saved the world loads of times from evil geniuses and criminal masterminds—thanks to her great disguises, gadgets (which sometimes work), and her brilliance at improvising in sticky situations. The three secret agent case files in this book are:
The Case of the Zombie Cows, in which Amelia visits a petting zoo where she's chased by tick-tocking cows into the yard of pecking clockwork chickens! Time for another dastardly plan to rule the world to be stopped, with Agent Amelia on the clock.
The Case of the Perilous Pipe, in which a new music teacher uses an enchanted pipe to make all the children follow her. Could it be the notorious Pied Piper's pipe? Trust Amelia to crack the spell, though!
The Case of the Creepy Cakes, in which an innocent desire for a doughnut uncovers a fiendish plot to take over the world! As the cream from exploding cakes in the bakery smothers every surface, Amelia can be sure she has uncovered the villains!