No. I don't buy physical tech books. I prefer to read the digital source so I can learn from multiple source simultaneously. In case I want to read it again or come back to specific location in the book, I use bookmarks.

The only books I buy physically is fiction and non-fiction books. Fiction is the best when I read it physically while chilling and having a cup of tea. It just doesn't work if I read it in my phone, it just distracting and I kinda hate blue light when I want to get off from any device to chill.