Collecting THOR (1966) #242-259 and ANNUAL #5 and MARVEL SPOTLIGHT (1971) #30.
*Writer Len Wein lifts Mjolnir aloft and rallies forth the armies of Asgard! When the Time-Twisters seek to destroy Earth, Thor embarks on an adventure with Zarrko the Tomorrow Man. It's a battle through time (with dinosaurs!) that will astonish you to the end! Then, Thor fights the Firelord in the jungles of Latin America, and only Jane Foster can save him! The Warriors Three ramble off on a solo adventure, while Thor returns to Asgard to face the one and only Mangog! Their battle will rage across the length and breadth of the Fabled Realm - and take Thor to Hel in a quest to save Odin! Also featuring new "Tales of Asgard," Thor vs. Ulik the Troll and a giant-sized Annual epic with Hercules! *Source: marvel.com