lots of snacks!! me and my sister did this last month and it was so fun. we also wrote down what page we started and ended on for each book so we can see how much we read
i tried to do this with my friend a couple years ago and we only ended up doing like 10 hours but still.. definitely recommend short fast paced books that are easy reads bc you won't get bored as quick and it'll keep you invested
any advice or tips