Sole authorship

Introduction to the Smarandache Function, http://www.amazon.com/Introduction-Smarandache-Function-Charles-Ashbacher/dp/1879585499/ref=sr_1_2?ie=UTF8&s=books&qid=1221241019&sr=1-2

Collection of Problems on Smarandache Notions, http://www.amazon.com/Collection-Problems-Smarandache-Notions-Ashbacher/dp/1879585502/ref=sr_1_4?ie=UTF8&s=books&qid=1221241019&sr=1-4

Pluckings From the Tree Of Smarandache Notions, http://www.amazon.com/Pluckings-tree-Smarandache-Sequences-functions/dp/1879585618/ref=sr_1_7?ie=UTF8&s=books&qid=1221241019&sr=1-7  

Introduction to Neutrosophic Logic, http://www.amazon.com/Introduction-Neutrosophic-Logic-Charles-Ashbacher/dp/1931233608/ref=sr_1_5?ie=UTF8&s=books&qid=1221241019&sr=1-5

Sams Teach Yourself XML in 24 Hours, http://www.amazon.com/SAMS-Teach-Yourself-XML-Hours/dp/0672319500/ref=sr_1_8?ie=UTF8&s=books&qid=1221241019&sr=1-8

Smarandache Sequences, Stereograms and Series, http://www.amazon.com/Smarandache-Sequences-Stereograms-Charles-Ashbacher/dp/1931233233/ref=sr_1_1?ie=UTF8&s=books&qid=1221241019&sr=1-1