"Against All Odds" Ghostwriter found?

[Bigfootman]

http://www.slate.com/blogs/nightlight/2016/08/11/a_nancy_drew_ghostwriter_on_the_art_of_being_carolyn_keene_and_the_evolution.html
Alice Leonhardt is the ghostwriter interviewed in the article. She wrote some Nancy Drew digests. A picture of "The Missing Horse Mystery" appears in the article, and she describes writing a book that is almost certainly "The Chocolate Covered Contest". But what's interesting is a few sections of the article:

" Leonhardt was a ghostwriter for various kids' mystery series, including Nancy Drew, for several decades beginning in the late '80s. "

"They were mysteries set around horses. I wrote quite a few of those. The Hardy Boys and all those—Nurse ... ? What was the nurse's name? I don't even remember. There were so many series out from Stratemeyer [the company that created Nancy Drew]. ... But anyway, that was the first series I worked with.

I guess editors were putting out feelers for people who could write horse stuff."
She was a Hardy Boys ghostwriter, and wrote a Hardy Boys book about horses. (If I'm reading that right)

"With Nancy Drew, you had Nancy Drews, you had the Hardys, you had the Nancy Drew Case Files, you had the Digests, you had the Super Mysteries, so there was a lot of overlap. The editor had to keep all the different plots straight, what was going on in which book."
She was writing while the Files and Casefiles were still around.

There's not too many Hardy Boys books about horses. In fact, Against All Odds and the SuperMystery High Stakes were the only two I could find. I couldn't find any  digests that focused on horses. Did Alice Leonhardt write Against All Odds or High Stakes?

Edit: She wrote Nancy Drew Files books as well according to this http://biography.jrank.org/pages/709/Leonhardt-Alice-1950-Alison-Hart.html I'm assuming that's what "Nancy Drew Casefiles" means.
Edit #2: She did not write "Win, Place, Or Die", Nancy Bush did. My mistake.

[MacGyver]

The Hardy Boys #103 The Million Dollar Nightmare is a Digest book about horses that came out in the early '90s. That could be one of the titles.

[Bigfootman]

I forgot about that one, opps.