是可数名词。复数形式为books。
意为书书籍印刷(或电子)出版物著作本子簿子。
原形英音: [buk]    美音: [bʊk]
复数形式英音 [bʊks]  美 [bʊks] 
例句:For her, books were as necessary to life as bread.
对她来说,书就像面包一样,是生活必需品。
On his desk is a mass of books and papers.
他的书桌上有大堆的书籍和文件。