Unsurpassed for its clarity and comprehensiveness, Hurley's, "A Concise Introduction to Logic, International Edition" is the Number 1 introductory logic textbook in the market. In this Eleventh Edition, Hurley continues to build upon the tradition of a lucid, focused, and accessible presentation of the basic subject matter of logic, both formal and informal. Hurley's extensive, carefully sequenced collection of exercises continue to guide students toward greater proficiency with the skills they are learning. This edition includes an expanded array of technology supplements, including Aplia, an online homework solution, and Logic CourseMate which includes additional practice and study tools, video clips covering topics that students find difficult, the complete text in eBook format, and the popular Learning Logic multimedia tutorial program. In response to market feedback and the success of Wadsworth's Logical Choice custom program, this book continues to offer multiple options to customize your course content. Finally, innovative tools including a PowerLecture presentation tool and a Community Website are designed to help you manage, create, and teach your course more efficiently and effectively.