Rudolf Steiner Archive is a website where you can read essentially almost all of Rudolf Steiner’s books and lectures for 100% free. From their website;
The Rudolf Steiner Archive is the largest digital library of the works of Rudolf Steiner available in English. With over 145,000 unique visitors each month, the site serves a vast community of Anthroposophists and researchers throughout the world.
All lectures and books can be sorted by date, GA (archive) number, and searched through. Multiple versions and translations of many lectures and books can be found on the website.
There are no fees required to access RSarchive, but donations are encouraged and they also have a bookshop where you can donate and buy books to support and help out financially.