<p>@jellyfish</p>
<p>You must referring to the prison and asylum reformer, Dorothea Dix. It'd be to your advantage if you know both Dix and Tubman--they aren't hard to remember; associate Dix with prison reform and Tubman with slavery--easy.</p>
<p>Back on topic: I recently purchased Barron's for Math II (although I haven't started using it). I'm using AMSCO and Crash Course for USH. I'm pretty sure that these are the best options out there.</p>