Since these books were published quite some time ago, your best bet is to look for them at your library or used-book stores. Bookshop.org has just the one title listed below, but Acorn Naturalists carries new copies of all the titles.
The Stories Matter
Disclaimer: Most of the books reviewed can be found at your public library or purchased through your local bookstore.
I am affiliate of Bookstore.org and will earn a commission if you click through the links and make a purchase from the Stories Matter storefront.
But, really, VISIT YOUR LOCAL PUBLIC LIBRARY!