libro en

listen to the pronunciation of libro en
Spanish - English
book in

I read the book in my second year of high school. - Leí el libro en mi segundo año en la preparatoria.

You'll find the book in the library. - Encontrarás el libro en la biblioteca.

When you book into a hotel or when you book in, you officially state that you have arrived to stay there, usually by signing your name in a register. He was happy to book into the Royal Pavilion Hotel Today Mahoney booked himself into one of the best hotels in Sydney = check in, check into check out, check out of