This project packages up your Readwise Reader inbox into nicely grouped epubs. I use it with a Kobo reader, but you should be able to use any device that can open epub files.
Install Rust and Percollate. These are both left as an exercise to the reader.
Install this project by running cargo install --path . in the root directory.
Set your Readwise auth token by setting the environment variable
READWISE_EPUB_READER_TOKEN or writing it to a file in your config
dir
<config>/readwise-epub/config.toml under the key reader_token.