Emperor Mollusk Versus the Sinister Brain by A. Lee Martinez
Who says supervillians can't retire? EMPEROR MOLLUSK has done it all. Sometimes twice. He's destroyed Saturn (well fine, not all of it---but 2/3rds!), created giant monsters, and until recently he was the Emperor of Earth. Yes, he still has the titles and the people are always looking to him for salvation when the aliens attack, but really, he keeps telling everyone he's retired. He's got better things to do...Like feed his pet ultrapede, Woola. Or buy groceries. But now, he's been marked by a legendary death cult for reasons unknown. And, honestly, feeding an ultrapede wasn't really utilizing his enormous intellect to its fullest potential. Emperor Mollusk is a supervillain, but when danger threatens, he will have to use all of his wiles, his feared intellect and superior technology to save Earth from the invasion of...THE SINISTER BRAIN!