<http://schema.org/reviewBody>
"Felix's previous world tours took him to famous cities and into different time periods; now he travels to various environments, and the result is less clear and focused. Children may not understand what the moon, the rainforest, and Australia have in common. The letters, however, are as delightful as ever. In one, Felix encloses a sheet of semaphore signals, which kids can use to make secret-code messages."^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.commonsensemedia.org/book-reviews/felix-explores-planet-earth-with-six-letters-from-felix-and-a-fold-out-world-map>