History 20*An Age of Progress- Clashing Twentieth-Country Global Forces-$30*The Penguin History of the Twentieth Century-$15*Child of the Dark-$5English*The Writer's Option-$35*Applied English Grammar-$10*50 Essays-$20*Anne Frank-$5Math*Pre-calculus A Unit Circle Approach- $30EE*Linear Algebra for Engineers and Scientist- $40