Scikitlearn Keras Y Tensorflow - Aprende Machine Learning Con

Here’s a deep text (expanded, enriched version) of your original phrase:

Then came the magic trick.

• Validación cruzada (scikit-learn) o callbacks (Keras: EarlyStopping, ModelCheckpoint).
• Ajuste de hiperparámetros: GridSearch/RandomizedSearch (scikit-learn) o Keras Tuner.

The specific book you are referring to is likely: aprende machine learning con scikitlearn keras y tensorflow