I read this ebook: https://interpreterbook.com/ https://interpreterbook.com/ That walks you through the process of creating a simple language. My version has

I read this ebook: https://interpreterbook.com/ https://interpreterbook.com/ That walks you through the process of creating a simple language. My version has since been extended a fair bit: https://github.com/skx/monkey https://github.com/skx/monkey The writing is clear, and I was familiar with the broad concepts already. (In the past I've written toy interpreters for FORTH, and similar simple languages, but usually in an adhoc fashion.)