I  have combined the  the cozy mystery books written by authors whose last names begin with "I" and "J"...

 J. A. Jance is yet another author who writes two thriving mystery series. Sheriff Joanna Brady "inherited" her police position from her husband who was killed while performing his sheriff's duties. I'm not entirely sure if this series qualifies as a "cozy mystery" series, but it definitely is a good mystery series to read.

Homicide Detective J. P. Beaumont is the main character in Jance's other mystery book series. I find both of the series equally good, which is usually not the case (in my opinion) when an author has two series to choose from. I usually start out reading one of the author's mystery series, try the other series of books, and then stay with the one series I enjoy more. In Jance's case, I find both of her mystery series equally good. (Jance also has a third series... the Walker Family Series, which I haven't started reading yet...)

Two authors I am looking forward to reading are Roderic Jeffries and Dolores Johnson. Both of these authors were recommended to me by several of my friends who read cozy mystery books.

Roderic Jeffries writes about Enrique Alvarez, a police inspector in Spain. Ms. Johnson's series takes place in Denver, and features the owner of a dry cleaning business. Again, you may wonder how a dry cleaner solves mysteries...... but, remember, the cozy mystery genre is famous for amateur sleuths.

India Ink  (aka Yasmine Galenorn)... India Ink writes the Bath and Body mystery series. Yasmine Galenorn's two series (Chintz 'n China and Sisters of the Moon) are mysteries with fantasy/romance, and a little supernatural thrown in.

William Irish   aka Cornell Woolrich & George Hopley…. As Woolrich, he wrote the novel which was later made into the classic Hitchcock movie “Rear Window.”  

Susan Isaacs    Isaacs wrote the second mystery in her series twenty years after the first book in the series. Although this amount of "between-time" is unusual, she is able to pull this feat off!

Jane Isenberg    Isenberg has her undergraduate degree from Vassar, with her doctorate from NYU.

Roberta Isleib    Isleib is a clinical psychologist who writes two mystery series, one about a professional golfer/sports psychologist and her second series is about a psychologist/advice columnist. She has been nominated for both of the prestigious Agatha and Anthony mystery awards.

Jonnie Jacobs   Jacobs has two series, both featuring strong women... one an attorney, and the other an artist.

J. A. Jance    Jance is an author who writes two series, and I still can't decide which is better.... the Joanna Brady series or the J. P. Beaumont series. I like them both equally, and I like them a lot! 

Roderic Jeffries   Not Cozy...  Inspector Alvarez in Spain, amongst others...

Emyl Jenkins   Jenkins has her Master's in Literature and has written several non fiction books, including some about antiques. Her passion for antiques led her to start an antiquing mystery series which features Sterling Glass... who is both a columnist and an antiques appraiser.

Dolores Johnson   Dry cleaning sleuth!

Linda O. Johnston   Johnston, a contract lawyer, writes the Petsitter Mystery series. The main character is an attorney and petsitter. Her sidekick is a cutie-pie Cavalier King Charles Spaniel named Lexie.