I'd say what is useful here only depends on if it's from the culture of the people still caught here. There are books on strategic approaches, as well as the art of war, but they may do little than frustrate you. We're not much of a "side" as we currently stand.

[It's clear she's thought of this. Still, she delves through different books to see the successes and weaknesses of different cultures: in their perceptions of themselves, in their values, and everything else. Knowing of these things doesn't mean she absorbs them, but preparation is always necessary. Lexa has accepted that for as long as she's awake, much will depend upon that.]

Perhaps the real question is this: did you read for enjoyment before you got here? And what did you read?