i've got a question about a book, the peak oil. I know there are different permanents up to 25% with a 2-day-lockout. And the 50% one which lasts 22 hours.
But i got one, that has a 25% bonus that lasts 1 day. I think I acquired it in trade months ago, and never stumbled upon one again. So my question is, is this book discontinued? If so, what could it be worth in trade?
Thanks for your help!