My two latest books are:

Who Pooped in Central Park? (the 20th book in the Who Pooped in the Park? series) follows four children as they wander through New York City's Central Park, learning about the animals from the poop they've left behind.

Gary's Guide to Successful Book Signings will walk you through your launch party, book signings, talks, panel discussions, and conventions. It covers everything from the basics (how do you sign a book?) to the advanced (what should be in your exhibitor kit at a book show?) replete with tips, tricks, sample signatures, photos of actual signings, and anecdotes.

Although I'm best known for my children's nature books, I began in the computer and electronics world. I've written technical books, historical fiction, a college textbook about closed captioning, and more.

In addition to over two dozen books, my list of publications includes technical manuals and hundreds of articles for magazines, newspapers, encyclopedias, and Web sites. I’ve written for a wide variety of publications, from the World Book Encyclopedia to Renaissance magazine, on subjects ranging from cattle to computer hacking.

As of summer 2016, I am also the General Manager/CEO of This House of Books, a community-owned bookstore in Billings, Montana.