She's the author or co-author of more than 30 nonfiction books as well as 16 romance novels under various pen names. (buildbookbuzz.com)
For example, Dean Kootz lists his various pen names on his website. (sidebarsaturdays.com)
I have over thirty titles out, too (under various pen names) and have sold over 20,000 books... but over a longer time than you have. (trainingauthors.com)