SUBSIDIARY GUARANTEE Supplemental Indenture, dated as of May 1, 2006 ("Supplemental Indenture" or "Guarantee"), by and among College Bookstores of America, Inc., an Illinois corporation (the "Guarantor"), Nebraska Book Company, Inc. (together with its...Subsidiary Guarantee • May 4th, 2006 • Nebraska Book Co • Wholesale-miscellaneous nondurable goods • New York
