Neither of the books _is___John's
neither of,单数.books不是复数吗？小弟英文不好，别见怪。。Neither of 就表示“都不是”凡是Neither of 就加单数。比如Neither of the twins goes to Beijing.Both of the twins go there.There are trees on either side of the road。建议你多看看either,neither,both……的用法。