Striving to become a master Go/Cloud developer; Father ๐จโ๐งโ๐ฆ; ๐ค/((Full Stack Web|Unity3D) + Developer)/g; Science supporter ๐ฉโ๐ฌ; https://coder.today
Books - layout the foundations. Learn statistics, R, and basic concepts
Courses - practice with real projects, fill in the gaps (that you haven't grasp from the books), learn the new developments (usually books are not up to date).
I see them as complementary sources,
This!