Well, of the four I've recently read, The Secret of the Old Clock (#1), The Bungalow Mystery (#3), The Mystery of Lilac Inn (#4) and this one, The Secret of Shadow Ranch (#5), this is by far the best. (I can't find my TWO copies of The Hidden Staircase (#2), so haven't re-read and reviewed it yet.)
This mystery, considering it's the world of Nancy Drew, is well-written, and contains clues, evidence, and a storyline that seems more natural than the others and less 'forced.' Nancy does move from one dangerous situation to the next, but there are interludes where she drinks tea, sings cowboy songs, bakes a cake, goes for a horseback ride and does 'in between stuff' which writers often stick in a book to give the reader a breather between dangerous, exciting, life-threatening stuff.
The story here involves a 'treasure' which a cowboy hid many years earlier for his lady love. Unfortunately the cowboy dies; the lady love leaves and marries another and here we are about seventy-eighty years later trying to find said treasure. Nancy has been told this story, and as a background story it's presented in very detailed form. This shows that someone put a lot of thought into it. I tend to think whoever this 'Carolyn Keene' was, he or she had a background in writing and possibly was an already-published writer under another name. Just a theory...
Anyhow there is no father, prominent lawyer Carson Drew about to drag things down and express his constant concern for his daughter who is always running around, getting tied up, mixing with the wrong crowd, and so on. In this story, Nancy is visiting the aunt and uncle of her two friends, Bess and George, on a ranch outside of Phoenix. (And real places! Not too many unnecessary characters either to keep track of! Less emphasis on hair color, too. :D ) At any rate, the aunt and uncle are having troubles a'plenty: electric lines being cut, fences taken down, their expensive palominos running wild across the prairie, and worst of all, a phantom horse which appears out of nowhere and scares the locals' pants off. (Especially the kindly cook who threatens to leave if that durn phantom horse keeps coming by!) There are hidden passageways, a ghost town, a cabin in the mountains, a raging river to ford, cliff dwellings, a barbecue AND a rodeo, and a sing-a-long AND a square dance. In stereotypical western terms, this book has it all!
(I forgot to mention a subplot involving a bank robbery and a missing father who's an artist, and the fact that one part of this book is a little politically incorrect. At a barbecue the girls 'dress up' as 'squaws,' though there is nothing derogatory in the passage, except that word and the fact they're 'dressing up.' Need to mention that.)
One important fact, this is the first mention of long-time friends of Nancy: Bess (always called plump though she looks pretty skinny to me in the drawings of her) and George (a tomboy, if you can't figure it out from the name.) Ned is also mentioned as a friend of Nancy's - a serious friend, get it? - but he makes no appearance. In fact there's this cowboy who's got his eye on Nancy but being a PG sort of book they don't even so much as hold hands though I KNOW the cowboy would like to take Nancy off into the mountains for a little 'clue gathering.'
(Nancy is forever hunting around for clues, for those who aren't in the know.)
At any rate, the story seems more mature than the first four I read, and I think it reflects the fact that it was written by someone else. Carolyn Keene wasn't a real person, but over time, was several different writers, and at times two or more writers working together, so...
This is the best of the bunch so far.