The books of hours are beautifully illustrated manuscripts that were popular in the Middle Ages.

The book of hours is a beautifully illustrated Christian devotional book.

I found a stack of telephone books in the basement.

She kept a commonplace-book to jot down her thoughts and ideas.

I found an old Book of Shadows in the attic.

The book-lung is a respiratory organ found in some arachnids.

Spiders have book-lungs to breathe.

I love listening to audio books on long car rides.

I love listening to audio books.

I love listening to audio-books.