My wife devours books faster than either she or I can find other ones she'll like. Here's an idea of what she likes and dislikes. If anyone has suggestions for other books or authors she should try out, let me know.

Likes:
Diana Gabaldon -- Outlander Series, but not the Lord John Series
Janet Evanovich -- Stephanie PLum, but not the others
Diane Mott Davidson
Harley Jane Kozak
Stephanie Meyer ("they were OK")
Adriana Trigiani (Big Stone Gap series)
James Long's "Ferney"

Disklikes:
More "hard" Mysteries (Parker, Kellerman, Sandford, Cornwell, Grafton)
Sci-Fi/Fantasy
"Juvenile" works (a la Harry Potter)
Thrillers (Grisham, Clancy, Flynn, Cussler)
Horror (King, Butcher, Barker)

Looking at our library, "my" books outnumber "hers" by about 20-to-1, so she's picky about what she reads. She just goes through them a lot faster than I do.

Here are a couple I enjoyed:

Sue Grafton--Kinsey Millhone series

Kay Hooper has several series

Susan Wiggs--Lakeshore chronicles

Jude Deveraux--Forever Trilogy (I have all 3 on my BS, can do all 3 for 2)

Kelly Armstrong--Women of the Otherworld series

That's all I can think of off the top of my head....good luck!

Has she tried any of the "Cozy" Series?  Personally, I'm not a big fan but there are lots and lots of PBSers that love them.

If she likes Adriana Trigiana, she may also like Dorothea Benton Frank, Anne Rivers Siddons, Cathy Lamb.  Good luck.

She might like Sara Donati's books, beginning with Into the Wilderness, and followed by Dawn on a Distant Shore, Lake in the Clouds, Fire Along the Sky, Queen of Swords and The Endless Forest (forthcoming in 2010).

Adriana Trigiani has a new series. The first book in the trilogy, Very Valentine, was released last month. 

What about the Mrs Pollifax series? I have very picky readers that I have to choose books for and if they like mysteries then they seem to like Mrs Pollifax.

Does she like historical mysteries? Micheal Jecks seems popular

M C Beaton is a cozy type writer.

Does she read humour? Christopher Moore, Jasper Fforde (Thursday Next series) are very amusing.

I'm guess she likes humor with romance if she likes Evanovich, so you might suggest Jennifer Crusie's older books, some of  Rachel Gibson, abd Katie FForde.

Davidson could be compared Joan Hess, Jill Churchill, Nancy Atherton, and Dorothy Cannell.  They  would probably be cosidered "cozies", but they generally have humor, a bit of mystery and are not gory. 

I would also recommend Barbara Kingsolver, Margaret Maron and Sharyn McCrumb...just because I really, really like their books.

Good luck

I wonder if she would enjoy Barbara Kingsolver. I would recommend The Poisonwood Bible, The Bean Trees, High Tide in Tucson, and other fiction. Also Anna Quindlen and Anne Rivers Siddons are excellent authors.  Up Island was one of my favorites (Anne Rivers Siddons). 

She might enjoy Susan Wittig Albert (who also writes as Robin Paige). She has 3 cozy series - the herbal shop mysteries, the Beatrix Potter Cottage mysteries, and the Victorian mysteries.

She might enjoy Jennifer Chiaverini's Elm Creek Quilts series, Elizabeth Berg, Elizabeth Noble, or Mary Alice Monroe as well.

Billie Letts is enjoyable reading.

How about anything by Jodi Picoult, Joan Medlicotts Covington series and Sophie Kinsella if she likes some humor. Sophie also published books as Madeline Wickham. Joann Flukes Bakery shop mysteries are an easy read good cozy too. Anne Tyler is another author that I like to read.

how about reading philippa gregory the boelyn inheritance the virgin lover the other boelyn just too name a few i read these and they are quite good.

It sounds like she favors lighthearted mysteries. If so, I'd try Tamar Myers as a previous poster mentioned, Joan Hess, Rita Mae Brown, Lillian Jackson Braun, Joanne Fluke, Sarah Shaber, Susan Holtzer, Elaine Viets, and possibly Kathy Reichs. Elizabeth Peters also offers a lot of interesting and well-written mysteries involving a family of archaeologists.

Have her try Karen Kingsbury's books.  The Baxter series books are great..they are chrisitian fiction.  She really makes you  feel like you know the characters and care about what is happening to them.  There are 5 books in this series and series that spin off from it.  There are also a lot of stand alone book.  The first one I read was Like dandilion dust..that one is a real tear jerker though.....

She may also like Tony Hillerman's mystery series with Jim Chee and Joe Leaphorn.

She might enjoy Robyn Carr's Virgin River series. Robyn also has the Grace Valley series.

Emilie Richards Shenandoah Album series.

Suzanne Brockmann

Has she read 
Thomas Kinkaid's and Katherine Spencer's Cape Light Novels? These are great books and as mentioned before Joanne Fluke and Karen Kingsbury. She might like Debbie Macomber also. she has some single books and a series called Cedar Cove Series. Sounds like your wife might like the type of books I do.

I second whoever suggested Sharyn McCrumb's Ballad Series and possibly her Elizabeth MacPherson series as well.  The Ballad series has a whiff of the supernatural -- a woman with the ability to "see" things, mostly -- but is set in the Appalachians, and the characters are exceptional.

Rita Mae Brown's Sneaky Pie series might interest her, though she would have to be willing to suspend her disbelief regarding a sentient cat and dog . . . also a good set of character studies, though.

Alexander McCall Smith's No 1 Ladie's Detective Agency Series is entertaining, and has no supernatural elements at all and the characters are excellent!

I love Deanna Rayburn's series with Julia Gray!, and second the Virgin River series recommendation (author Robyn Carr). Debbie

sandra brown's 'envy' was so good.richard paul evan-the christmas box and timepiece....jan karon's mitford series..james patterson's sunday at tiffany's..sidney sheldon's rage of angles...nicholas sparks, nicholas sparks' the notebook...jaqueline winspear's maisie dobbs. i could go on and on.

If she likes historical fiction, I'd recommend Phillipa Gregory, Elizabeth Chadwick, Laura Kinsale, Rosalind Miles and Isolde Martyn.  One word of caution about Elizabeth Chadwick - there are two authors with that name.  One is American, one is English.  I'm referring to the English one.  I haven't read any of the American EC books so I'm not familiar with them, I think she's a romance  writer.

Sara Booth Delaney series by Carolyn Haines  (love this one!)

Tucker Sinclair series by Patricia Smiley

Curtiss Ann Matlock

Luanne Rice

I like the Jane Kelly series by Nancy Bush.  Candy Apple Red, Electric Blue and Ultra Violet

I also recently read and enjoyed Charmed and Dangerous by Toni McGee Causey.

Both of these have a quirky main character similar to Janet Evanovich's Stephanie Plum but I think they are more likeable because they actually seem to progress towards something through out the books and series.

I love the Jack Daniels series by J.A. Konrath.  (Jack is short for Jacqueline.)  Just finished the latest one -- "Fuzzy Navel," what an ending! so I can't wait for the next one, "Cherry Bomb."  (All titles are names of drinks; MUST start at the beginning because relationships evolve.)