I don't like such books （ ） he bought in the bookshop 定语从句 括

as
当先行词前有such,so,as时,关系词应当用as.如：
A wise man seldom talks about such things as he doesn’t understand.
He spoke in such easy English as everybody could understand.
At this time of the day,all buses and trolleys have to carry as many passengers as they can.
It is so easy a book as every schoolboy can read.
Let’s discuss such things as we can talk of freely.

that

that 这是个定语从句
因为主句中有such 当主句中有such、形容词副词的最高级时 后面的定语从句必须要用that

that或者which
祝你学习进步，更上一层楼！(*^__^*)
有不会的可以再问我:）