According to GoodReads.com, some authors similar to Janet Evanovich include Stephanie Bond, Lisa Lutz and Sue Grafton. Some additional similar authors listed on Cozy Mystery, a blog with lists of novels and authors, include Donna Andrews and Lori Avocato.
Stephanie Bond authors the Body Movers series, a contemporary women's fiction mystery series similar to Evanovich's work in its humor and themes. Lisa Lutz is most popular for her The Spellmans series, which shares a similar approach to the mystery-thriller genre. Finally, Sue Grafton has written many popular mystery novels in the Kinsey Millhone series, which is often compared to Evanovich's Stephanie Plum series.