ALERT: Before you purchase, check with your instructor or review your course syllabus to ensure that you select the correct ISBN. Several versions of Pearson's MyLab & Mastering products exist for each title, including customized versions for individual schools, and registrations are not transferable. In addition, you may need a CourseID, provided by your instructor, to register for and use Pearson's MyLab & Mastering products.  Packages Access codes for Pearson's MyLab & Mastering products may not be included when purchasing or renting from companies other than Pearson; check with the seller before completing your purchase.  Used or rental books If you rent or purchase a used book with an access code, the access code may have been redeemed previously and you may have to purchase a new access code.  Access codes Access codes that are purchased from sellers other than Pearson carry a higher risk of being either the wrong ISBN or a previously redeemed code. Check with the seller prior to purchase.  --Updated in a new 10th edition, Essentials of American Government provides the historical context students need to understand our government and the most crucial and controversial issues affecting the nation in the 21st century. This bestselling book has been extensively revised to provide in-depth coverage of President Barack Obama’s first two years in office and the 111th Congress, the 2010 congressional elections, continued concerns related to the wars in Iraq and Afghanistan, and domestic concerns related to health care reform and the economy.