The Amazing Mexican Secret (Flat Stanley's Worldwide Adventures Series #5)

Flat Stanley is taking over the world, one city at a
time! In this fantastic fifth installment in the renowned Flat Stanley’s
Worldwide Adventures chapter book series, Stanley, the flattest kid on Earth,
gets mailed to Mexico!

When Stanley's mother needs the secret ingredient for a special recipe, Stanley mails himself to Mexico to track down its mysterious maker. But when a band of spies threatens to steal the secret, Stanley's simple trip becomes a race against an opponent that even a flat bo...