This absolutely had a Ready Player One feel to it. Which is great, because RPO is a great book. I was asked as I was reading this one if it's a YA (young adult) book. It's not. The main characters are teenagers, but I think that the teenagers today would not get the fun in about half the book. Because the fun was all in the throwback. One reviewer called The Impossible Fortress "a love letter to the 1980s" and I think that is a great description. All kinds of great pop culture and political references had me saying to myself, "Oh yeah! I remember that!" (And now that I have dated myself, let's move on with the review.) 
 The fun in it also comes from the fact that the boys are putting together this whole elaborate scheme to get a magazine. I really enjoyed the main trio for a few reasons. First -- they are all boys. So many books have done the "two boys and one girl" thing, and so many more books have done the four girls, so it was nice to have a unique set of protagonists. Rekulak also did a great job of establishing the deep bond between the boys. 
 It was also great to see... 
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