From a reader:

Just got back from Mr. Derbyshireโ€™s book signing in SF. He seemed very well received by the audience and big kudos to him for willingly identifying himself as a Republican in this town. He even indulged my request to inscribe โ€œMath is Hardโ€ into my copy of the book, a la Malibu Stacy. Take care and keep up the great work. Perhaps sometime Iโ€™ll subscribe.

Glad he bought Derbโ€™s book, but donโ€™t stop shopping NR now!