At the beginning of diving into a topic area or when I want to go very deep on a subject. Books tend to have good comprehensive overviews of an area/technology

At the beginning of diving into a topic area or when I want to go very deep on a subject. Books tend to have good comprehensive overviews of an area/technology, whereas most online tutorials are very shallow, even if more current. On the flip side, when I need /deep/ understanding it’s almost always a combination of a book on the topic to fill in holes I missed, the docs, and live repos if available. If it’s just for day to day use, or a technology I’m only using in passing - no. I do vet the authors though. A lot of trash is published.