If you are near a university bookstore, find out what the beginning level logic course is (usually offered by the philosophy department), and then find the text on the shelves.
Other than that, go to a really good bookstore, go to the logic section (might be near mathematics, or might be in the philosophy section), and read the prefaces of books that have titles like
Logic or
Introduction to Logic to see if any are intended as a beginning level textbook.
A big used book store in a college town that sells used textbooks is another good bet.
I think intro level textbooks will be pretty much interchangeable.
Kings were put to death long before 21 January 1793. But regicides of earlier times and their followers were interested in attacking the person, not the principle, of the king. They wanted another king, and that was all. It never occurred to them that the throne could remain empty forever. -- Albert Camus