I found this on Jayne Ann Krentz's website:

Attention Jayne Castle collectors! So many of you have asked to have the Guinevere Jones books — long out of print — made available again. I am happy to tell you that my publisher is going to reissue them this summer in eBook format starting in July. Two of the covers are up at the online bookstores. The next two will be up soon. This is a four-book mystery series that I wrote a while back featuring Guinevere Jones (no connection to Arcane Jones) and Zachariah Justis. The stories are set in Seattle. I hope you enjoy them.

The four books and their new publishing dates:

THE DESPERATE GAME (Jayne Castle)
A Guinevere Jones Novel #1
Reissue from 1986 print edition
eBook
On Sale July 10, 2012
InterMix/Penguin; ASIN: B007P7HZFE
ISBN-13: 978-1101569757

THE CHILLING DECEPTION (Jayne Castle)
A Guinevere Jones Novel #2
Reissue from 1986 print edition
eBook
On Sale July 10, 2012
InterMix/Penguin; ASIN: B007P7HV9E
ISBN-13: 978-1101569764

THE SINISTER TOUCH (Jayne Castle)
A Guinevere Jones Novel #3
Reissue from 1986 print edition
eBook
On Sale August 14, 2012
InterMix/Penguin; ASIN: B007P7HRQG
ISBN-13: 978-1101569771

THE FATAL FORTUNE (Jayne Castle)
A Guinevere Jones Novel #4
Reissue from 1986 print edition
eBook
On Sale August 14, 2012
InterMix/Penguin; ASIN: B007P7HQQ2
ISBN-13: 978-1101569788

It looks like both Amazon and Barnes and Noble will have the books.

And after I bought all four for like fifty frickin bucks! Ah well. Hopefully they re release her Jayne Bentley books too *crosses fingers* I HAVE TO COMPLETE MY JAYNE ANN KRENTZ COLLECTION BEFORE I DIE.

I have all of em except those damn four. They haunt me :)

I hear you Amanda...I paid 25.00 for one old one. I could kick myself now for that.

I found some old copies and finished reading them about 2 weeks before she announced this!  

Yes, I just managed to get all the books about a month or two ago.  I haven't read them yet but man what timing.  I hope that some of her other out of print books become ebooks too.

I also got a twenty seven dollar copy of Comanche Magic less than a month before Anderson announced it was being reprinted. *rolls eyes*

At least now people will get to read them at least. I hope authors in general see the wisdom of at least releasing out of print books in ebook format now - I'd get a Nook or Kindle just for that.