I just got a copy of "Mythology", from Candlewick Press. As anyone familiar with Candlewick's "-ology" series (Dragonology, Egyptology, Wizardology and Pirateology), the book is beautiful and replete with bits of interactive fun for young readers ("suitable for ages 6 and up").
The format itself has become a staple of the publishing industry, always in search of ways to capture the elusive boy-reader. The format is aging, however, and I'm disappointed to find that "Mythology" does not innovate.
As is clear by the lettering and image of Heracles fighting the Hydra (I *think*) on the cover, the book focuses on Greek mythology. It does a good job of showcasing the major characters, stories and themes to the reader...but gets a bit dry at times (for the young reader).
It doesn't spend much time on the older members of the pantheon (Hecate isn't mentioned at all, nor is the Teumessian Fox) but both the Boar of Calydonia and Echidna (referred to in Black Poplar as "Ekhis") show up in print here.