The sentinel of liberty faces the horrors of a dark dimension! Thrust into a bizarre, inhospitable world far from home, the all-new, high-adventure, mind-melting, tough-as-nails, sci-fi, pulp-fantasy era of Captain America. With no country and no allies, what's left for the Sentinel of Liberty to protect? Collecting Captain America Vol.7 #1-5.

Racket is a descendant of Lisp, a programming language renowned for its elegance, power, and challenging learning curve. But while Racket retains the functional goodness of Lisp, it was designed with beginning programmers in mind. Realm of Racket is your introduction to the Racket language. In Realm of Racket, you'll learn to program by creating increasingly complex games. Your journey begins with the Guess My Number game and coverage of some basic Racket etiquette. Next you'll dig into syntax and semantics, lists, structures, and conditionals, and learn to work with recursion and the GUI as you build the Robot Snake game. After that it's on to lambda and mutant structs (and an Orc Battle), and fancy loops and the Dice of Doom. Finally, you'll explore laziness, AI, distributed games, and the Hungry Henry game. As you progress through the games, chapter checkpoints and challenges help reinforce what you've learned. Offbeat comics keep things fun along the way. As you travel through the Racket realm, you'll: Master the quirks of Racket's syntax and semantics; Learn to write concise and elegant functional programs; Create a graphical user interface using the 2htdp/image library; Create a server to handle true multiplayer games Realm of Racket is a light-hearted guide to some serious programming. Read it to see why Racketeers have so much fun!

Captain America is thrust into a bizarre alternate world called Dimension Z by the evil Arnim Zola, and must find a way back to his own world while protecting Zola's long-lost son.