Also not the OP, but unequivocally yes (though for full disclosure, I am biased as was one of the technical reviewers for the second edition). It was hugely imp

Also not the OP, but unequivocally yes (though for full disclosure, I am biased as was one of the technical reviewers for the second edition). It was hugely important to me personally learning the language; the approach is excellent and it's very well written. You take a simple to-do application and write a number of versions of it, each one progressively more complex and featureful, and each one using progressively higher language/OTP abstractions.