The Avazu click-through rate Prediction for chapter 4 is no longer available from Kaggle.

[RusDavies]

The contest page still exists here

However, attempting to download the data ends in "We can't find that page" error.

It would be great if an errata.md for the chapter pointed readers to some other valid data.

[RusDavies]

There is another dataset, Avazu CTR Prediction with random 50k rows, which seems to be a truncated version of the dataset and does work for the exercise.