Presented in its unabridged form, this modern military superhero saga chronicles the battle between Earth's superheroes and a transdimensional Third Reich. Invasion is book one of the Secret World Chronicle, and comes packed with bonus content, including several short stories also taking place in the Secret World universe.

From New York Times best-seller and science fiction and fantasy mistress of adventure Mercedes Lackey, #2 in a new pulse-pounding saga of modern-day humans with superpowers. After turning back an invasion of super-science power Nazi war machines, the heroes go on the hunt for the Nazi masters and take the battle to the bad guys. Meta-Heroes Battle On! After an Earth-scarring apocalyptic battle, humanity’s meta-heroes must take the fight to the enemy. Their task: hunt down the secret puppetmasters behind the Nazi robot invasion, the Thule Society, and cut off the multi-universe plague the Thulians have unleashed. It’s go time once again for the meta-heroes including fire-bender John Murdock, hacker-witch Vikki Nagy, healer Belladona Blue, super-quick Mercurye–and most of all for their ghostly ally, Seraphym, the spirit of the world who uses her secret influence to direct the fight against a Thulian-based tyranny of evil that is fast descending upon the entire universe! From New York Times best-seller and science fiction and fantasy mistress of adventure Mercedes Lackey together with a team of topnotch collaborators, the second entry in the blockbuster saga of superpowers–and the very human men and women who must learn to wield them. About World Divided: "[C]omes together seamlessly. . .an awesome and lightning-paced story: read it on a day when you will not have to put it down."–San Francisco Book Review About Mercedes Lackey: "With [Mercedes Lackey], suspense never lags..." –Kliatt

From New York Times best-seller and science fiction and fantasy mistress of adventure Mercedes Lackey, Book #3 in a new pulse-pounding saga of modern-day humans with superpowers. The metaheroes deal with supervillain Verdegris, who seeks to destroy them from within, before turning their attention back to the Thulian conspiracy. It’s go time once again for the meta-heroes including fire-bender John Murdock, hacker-witch Vikki Nagy, healer Belladona Blue, super-quick Mercurye–and most of all for their ghostly ally, Seraphym, the spirit of the world Verdegris knows he must trap and destroy her if he is to take down the metas. From New York Times best-seller and science fiction and fantasy mistress of adventure Mercedes Lackey together with a team of topnotch collaborators, the third entry in the blockbuster saga of superpowers–and the very human men and women who must learn to wield them. About World Divided: "[C]omes together seamlessly…an awesome and lightning-paced story: read it on a day when you will not have to put it down."–San Francisco Book Review About Mercedes Lackey: "With [Mercedes Lackey], suspense never lags…" –Kliatt

From New York Times best-seller and science fiction and fantasy mistress of adventure Mercedes Lackey, Book #4 in the pulse-pounding SECRET WORLD saga of modern-day humans with superpowers. Destroying the Thulian North American Headquarters has not made life easier for ECHO, or the world. The Thulians continue their attacks, first in unpredictable incursions, then with another all-out assault on ECHO, orchestrated against ECHO headquarters across the world. Dominic Verdigris has not given up on his effort to obtain The Seraphym for himself, in order to use her to avert his own fate at the hands of the Thulians. Nor have the heroes of ECHO and the CCCP found life anything but harder. Belladonna's duties have increased a thousand-fold, and now she has responsibility for the lives of every metahuman in ECHO on her conscience. Obviously using the intelligence gathered from the raid on the North American Thulian base to find the main Headquarters is of paramount importance—but once it is found, can she manage to convince the armies of the world to follow ECHO into an all-out attack? Then Red Saviour risks everything on a risky gambit of her own: send her wolves of the CCCP to find the Thulian Headquarters, despite the dangers, and despite the consequences of blowing everything on this hazardous gambit that could very well end, not in victory, but with the world in flames. At the publisher's request, this title is sold without DRM (Digital Rights Management). About World Divided, Book 2 in the Secret World Chronicle: "[C]omes together seamlessly. . .an awesome and lightning-paced story: read it on a day when you will not have to put it down."–San Francisco Book Review About Mercedes Lackey: "With [Mercedes Lackey], suspense never lags..." –Kliatt The Secret World Chronicle Invasion World Divided Revolution Collision Mercedes Lackey is the New York Times best-selling author of the Bardic Voices series and the Serrated Edge series (both Baen), the Heralds of Valdemar series, and many more. Among her popular Baen titles are The Fire Rose, The Lark and the Wren, and also The Shadow of the Lion and Burdens of the Dead with Eric Flint and Dave Freer. She lives in Oklahoma. Cody Martin is originally from Scottsdale Arizona and currently resides in Florida. An avid gamer, he spends his extra time chained to a computer, writing. Dennis Lee was born in Seoul, Korea and grew up in Canada. He has a degree in pharmacology and is a cell biologist when not writing. Veronica Giguere started off as the voice artist for the Secret World Chronicle podcasts then quickly proved her writing chops and was taken on as a series coauthor. Veronica remains active as a voice talent. An educator with a background in mathematics and ocean engineering, she has lent her voice to various research and campus promotional endeavors. She makes her home in Florida.

From New York Times best-selling author and science fiction and fantasy mistress of adventure Mercedes Lackey, the continuation of a new saga of modern-day humans with superpowers—and the men and women who must learn to wield those powers without losing themselves in the process. Inspired by characters created for the massive multiplayer on-line game City of Heroes, and supported by a popular web site podcast! With Metis in smoking ruins, most of the Metisians dead, and the Thulians bringing literal blitzkrieg to the whole world, you would think that things could not get worse for the heroes of ECHO. Wrong. Red Djinni's past is about to catch up to him. So is Vickie's. The Thulian operatives working in the shadows are about to bring a whole new level of pain. And Verdigris is by no means finished. The avalanche has begun. It is too late for the pebbles to vote. About Mercedes Lackey:About World Divided, Book 2 in the Secret World Chronicle: "[C]omes together seamlessly . . . an awesome and lightning-paced story: read it on a day when you will not have to put it down."–San Francisco Book Review About Mercedes Lackey: "With [Mercedes Lackey], suspense never lags . . . " –Kliatt The Secret World Chronicle Invasion World Divided Revolution Collision Avalanche