Furthermore, the bigger kids get to choose the books and already understand that this activity will be fun. But it won't take long. This needs some negotiating. Again, trust the power of the art and the stories to win the day. If one doesn't like the other one's selection, it'll be over soon.
Most picture books are usually very brief.
Bedtime reading has become very difficult. It's delightful, and also delays the bedtime enormously. My solution was an animal hand puppet. One more book, please. She told me to be quiet when leaving her bedside.