Collects Brave and the Bold (2007) #7-12.
*Superman. Wonder Woman. The Flash. Power Girl. The Doom Patrol. Hawkman. Aquaman. The Teen Titans. They're among the mightiest beings who have ever lived. Together, they are a force that can vanquish any known threat to the universe -- But what about the unknown?
A mysterious being called Megistus travels between centuries to steal objects and abduct people. Though only he knows his reasons, his actions catch the attention of a team of nonpowered adventurers, the Challengers of the Unknown. In possession of the Book of Destiny, an account of all that ever happened and all that ever will -- and the only possible means of piecing together this mystery -- the Challengers join with Superman, Wonder Woman and an incredible alliance of heroes to uncover Megistus's deadly plan and put a stop to it before the universe pays the price. But is the universe destined to survive?
Challenging the unknown!
Megistus. Throughout history this name is synonymous with larceny and death. With his plan to travel across centuries in order to steal mystical treasures, Megistus thinks it would be impossible for anyone to discover the true reasons behind the crimes.
The key lies in an omnipotent artifact known as the Book of Destiny, which contains the knowledge of all things past, present and future. For the first time, it is in the hands of humans -- a band of adventurers calling themselves the Challengers of the Unknown. Having cheated death, the Challengers are the only beings with the ability to read the book, but at a price -- the stories drive them insane.
Can the team maintain clarity long enough to uncover Megistus's fiendish plot, or will the Earth get a new Lord and Master? *Source: Dust Jacket
**The Book of Destiny's been opened, and it will take the combined might of Superman, The Flash, the Metal Men, the Blackhawks, the Atom, Hawkman, Aquaman, the Teen Titans, the Newsboy Legion and more to prevent certain doom! **Source: dccomics.com