I am planning (pending the boards approval) on taking the Principals and Practices and Oregon State specific exams this coming April. I am on a budget and need some guidance as to what books you would deem absolutely essential for taking into the exam room. I've got the latest Surveyor's Reference Manual and Brown's Boundary Control & Legal Principals, and I can borrow a copy of Black's Law Dictionary. I've seen the suggested books in the reference manual but that would cost a fortune and in reading the reviews, well some say, "gotta have it" and others say, "save your money". Your help is appreciated.