Our pbooks and ebooks can be ordered from Amazon.com, BarnesAndNoble.com, Apple.com and other online and bricks-and-mortar booksellers -- both in the United States and in other countries.



A few titles are currently available only in PDF format from Lulu.com. In the future they may be available in more formats.



Some sellers discount our books, and others charge more than list price. Free shipping is sometimes available.



Booksellers and libraries can order our books through Ingram, Baker & Taylor and NACSCORP.



For information on bulk sales, customized editions or autographed books, please contact us.