which book do you think is ( ) of the two

问题描述:

which book do you think is ( ) of the two
which book do you think is( )of the two 为什么括号内填the more interesting,而不是more interesting?如果有the,interesting后面不是应该加上一个中心词吗?如the more interesting book.
对不起我还是不太理解,为什么有of the two 就有the

因为后面还有of the two 啊