Does Book have a long or short vowel sound?

The OO pair in book has a short OO sound, as in good and foot.

Almost all English speakers say 'book' with a short vowel (in fact a schwa).

In some areas of northern England 'book' has a long vowel - its double 'o' is like the double 'o' in food. In these areas cook and look rhyme with book; suck and tuck rhyme with the standardpronounciation of book.