By technical book I mean books that are not fiction. Can be of any topic under the sun that you were interested to study; so you picked up the book.
👤 dist1ll Accepted Answer ✓
Pattern Recognition and Machine Learning. Absolutely beautifully written.
Bishop, Christopher M., and Nasser M. Nasrabadi. Pattern recognition and
machine learning. Vol. 4. No. 4. New York: springer, 2006.
https://link.springer.com/book/9780387310732