Memorizing the 20-30 traps and mistakes in those studies is sufficient for beginners; you can use spaced repetition (I use my own private Lichess study to collect positions) and cover the 20 or so most popular openings in a few months.
Again, not enough to win but it helps you punish bad play and learn how to handle aggressive players (since many of the traps are in fact bad play but only with perfect counterplay)
What's a good book for this?