Free Cookbooks Collection Link
I came across a great resource on Reddit that you can access free cook books via Internet Archive! Doesn't require Downloading apps, you can literally access within your device's internet browser all the pages in real time. Woop woop. Wide range through the years and one more thing! Trust. Just because many are old books, doesn't mean it's useless. In fact, arguably better than today's cookbooks!
10,000 Shared Cookbook Collection
Some books require you to create a free account to "borrow" the book.
I know it can be overwhelming navigating through the site. I decided to make things slightly easier for you! Here are some collections related to healthy cookbooks. You can browse yourself since there are way more subjects go go through.