Hyperion and the great balls of fire
(Book)

"Phew, it's hot! Under the titan Hyperion's rule, the sun is burning even brighter than normal and scorching everything in northern Greece--including the villagers! The Olympians are forced to play a sizzling "game" of Dodge the Sunbursts as Hyperion hurls giant fireballs that could fry them to pieces! Armed with some clues, Zeus, Poseidon, and Hades set out to figure out why in the world Hyperion has been making things so hot. They also need to rescue Hera, who is still missing. Battling the extreme heat--and some fantastical and scary creatures, courtesy of their old foe Cronus--the boys are off on another epic adventure...and Zeus is one step closer to discovering his destiny."--Publisher's statement on Amazon.com.