I used Calibre Library, an ebook library organization program that can also convert many file types to convert files into an epub file for our Kobo e-reader. https://calibre-ebook.com/ Available for all major operating systems and has smartphone apps though I doubt those have editing capabalities. Here's all the file types it can convert but not all file type combos will work right. https://manual.calibre-ebook.com/generated/en/ebook-convert.html All the conversions I've done were just a matter of a few clicks and a little waiting time for the conversion to process, minutes.
The kids are grown up now but I found another purpose for the e-reader, recipes or recipe cards as they were called and kept quite often a few decades ago. It's small and thin. Ours is not slippery. There's not many buttons and they're hard to accidently activate. There's no glare. Some will accept many different file types like PDF files, though those tend to be big. Since a recipe is way smaller than a book, you could fit many thousands of recipes on one. The lousy image above shows our Yellow Rice recipe. The reader is turned off but many types of "electronic paper", the tech that displays text, will hold the text/image even when powered off. The Yellow Rice is something we make on a regular basis and our son makes it in the Instant Pot so all he has to do is grab the reader and read it. No need to even power up.
If you're a prepper, you will want them printed out but until the shtf, you could keep the printed ones fresh and use an e-reader in the meantime. It's way easier the deal with on a counter top than a book or sheet of paper. Likewise of you're cooking outdoors since a little wind won't be a problem nor will sunlight glare. Calibre will connect to most any e-reader and then you can sync your library. Kindle files can be converted by Calibre so if you bought a cook book on amazon, you could convert and load it to most any e-reader. Likewise with a pdf file.(like the ones I posted last week)
In the case of recipes, you'll want to organize them. The most standard way Calibre organizes and groups books is by Author so you could simply name the author Main Courses or Breakfast. If you want a hierarchy, you can add custom columns with them being tag based as explained here; https://manual.calibre-ebook.com/sub_groups.html
To give you an idea of file size; I converted a pdf recipe to epub. The pdf was 84.5kb and the epub 30.8kb. I converted the King James Bible from MOBI(kindle) to epub. Mobi 6.3mb and epub 1.5mb.(that's a lot of recipes:)
So if you have an old e-reader or someone offers you one or you want to buy a cheap used one online, strictly for recipes, they are handy for that or any other info you want. You can create a book right in Calibre or create a text file and convert it to epub or MOBI or whatever format works for your e-reader. Looking at new and used ones on ebay and they're a little more expensive than I thought. $25-60 generally.