Thank you for edits in Lukianenko. Yet a few notes. 1. I wouldn't say that knights seek for revenge: not all and not always; they just learned it. 2. I also think that it's still interesting why the confederation failed: it was nearly established, many islands were united, but it died from inner opposition, more strictly, betrayal. Some guys wanted to get their "piece of pie" immediately, and to get it, they attacked people from the 34th island, one which proposed the idea of confederation. And the fail of confederation was natural, it couldn't succeed, unfortunately. 
 You might be interested in the ending of this book: they committed a sabotage, that is, they sent to their masters several bricks of dynamite via the teleportation cupboard, which was used by their masters to send them food and medicines. The sabotage succeded, reactor stopped as well as the protecting systems. They leaved the place of 40 islands, and showed those extraterrestrials, who is more strong ) Then Dimma and Inga returned home, and met a band of hooligans. They easily won them, but then Dimma broke his sword, because it's wrong, to use such abilities on earth, to bring lifestyle of 40 islands to home, to bring it with him...  
 Just i don't know if it's correct to 'reveal all cards'.