Searching inside the books
Amazon.com's "Search inside this Book" function lets you type in a keyword and search the entire text of the book for all references to that keyword. It works better for single words than for phrases, but I've found it to be quite accurate. And in the case of the OUTLANDER books, it can be quite a time-saver, when the alternative is to try leafing through 900+ pages by hand!
Here are the "Search inside this book" pages for the OUTLANDER books:
I hope you find these links as useful as I have. They don't (apparently) work for everybody, but it's probably worth a try. And if you have more search tips, feel free to share them.