Sure, the books are aimed at Kindle users, but you don't need a Kindle to read them.
Just go here to download Kindle for PC
Mac users will have to wait a little longer though... For now Amazon just says that Kindle for Mac is "coming soon."
The new mother of seven, I'm also a journalist who is using those skills to search out the best cheap deals out there. All the while, I'll keep in mind what my Dad used to say: "It isn't a bargain if you don't need it."