book in/book into somewhere
phrasal verb with book verb uk/bʊk/ us/bʊk/
UK (US check in/check into somewhere)
登记入住(酒店)
to say that you have arrived and sign an official book when you get to a hotel
After booking into our hotel, we went straight down to the beach. 登记入住酒店后,我们就径直去了海滩。
As soon as she arrived in Tokyo, she booked in at her hotel. 她一到东京就登记入住了酒店。