I am pleased to see that I am not the only person who wasn't crazy about Cory Doctorow's book Little Brother. One of the people who doesn't like it is even an actual teenager, which removes the "not the target audience" problem (though I read and enjoy "young adult" books pretty regularly).
Trusting as I do the opinions of the denizens of Making Light, I was very disappointed; I suspect I'd have enjoyed the book more if it hadn't been for all the people there saying it was the best thing since sliced bread.