What are the best book abilities and upgrades in Indiana Jones and the Great Circle? Since Indy isn't the most powerful of action stars, you need to rely on abilities that improve his physical skills, as well as those that give him more ways to take on the Nazis that plague the world. Among those skills, some are a lot more useful than others, so you need to be picky with which you unlock so that you're not wasting your vital Adventure Points.
Indiana Jones and the Great Circle approaches skills and upgrades in a different way to most action adventure games. Instead of giving you a skill tree to work through, you need to find Adventure Books around the world, both in missions and the open world sections. Then, once you've found the books, you need to spend Adventure Points to unlock each one individually. Finding the book only gives you the chance to purchase the ability or upgrade.
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