First I simplified the spanish[0] but simplification can't remove every word I don't know. This led me to adding the definition for words I probably wouldn't know[1].
Second simplifying the spanish ruined the magic of Don Quijote so I tried just adding definitions to the original[2].
The definitions aren't perfect but they let me stay in the flow of the text. I'm tempted to make a firefox extension to annotate any website so I can spend more time reading spanish.
Let me know what you think!
[0] https://spanish-xz56.s3.amazonaws.com/2000_simple.epub
[1] https://spanish-xz56.s3.amazonaws.com/2000_simple_B1.epub
[2] https://spanish-xz56.s3.amazonaws.com/2000_B1.epub