In a new collection reprinting JLA #55-60 and featuring the World's Greatest Heroes, we discover that some of the JLA's deadliest foes - the White Martians - have returned with a plan to systematically destroy each one of our heroes and disable the Earth's ability to create their one weakness: fire!  Plus, THE JOKER: LAST LAUGH crossover issue that featured a "Jokerized" version of Doctor Polaris wreaking havoc on Earth's magnetic poles, and a classic Christmas tale titled "'Twas' the Fight Before Christmas."