[3] Katz has written several novels as well as non-fiction works which cover topics ranging from geek culture to people's evolving relationship with animals.

He wrote a successful series of mystery novels centered around the character Kit DeLeeuw, a former Wall Street financier turned private investigator, based in the fictional Rochambeau, New Jersey.

These photos feature portraits (primarily of animals) as well as landscapes and scenic shots taken on his farm and in the surrounding rural areas and small towns of upstate New York.

[6] Some criticism was leveled at Katz when he posted an article about an e-mail message he purportedly received from a teenager named "Junis" in Afghanistan who had just rejoined the Internet in late 2001.

According to Katz, Junis wrote his e-mail from "his ancient Commodore computer", which he had "dug up" and was now using to download movies, pornography, and MP3s thanks to the recent liberation of Afghanistan.

[7] Because of the unlikelihood of performing these activities on the Commodore 64, some Slashdot readers felt this demonstrated Katz's lack of technical knowledge about computers.

[8] Katz's books about dogs have received favorable reviews in the literary press,[9] but have been met with a hostile reaction in segments of the Border Collie community.