Referring to books as "dead trees" is such a pathetic thought-terminating cliché.
If you don't want to cart books around that's fine but you can easily play the game with only the basic three (and players just need one).
If you are using a book just for a spell or an item or two you can just photocopy the page.
Sir, I’m in the middle of a 20 year campaign…
[flagged]
Ok, I’ll bite.
We have a lot of pages, books, novels, notes, story from the last 10 years or so that would make it physically impossible to bring with me. Bringing just my iPad and a notepad is way better for me.