My aunt bought me -- many story books that I spent a lot of

My aunt bought me __ many story books that I spent a lot of time __ reading them.
A:such on B :so in 书上的答案是B：so in.so +形容词..that 表示如此.以至于
such+（形容词）名词..that也表示如此.以至于.此题that前有个books名词了,应该用such啊,对么?后面的空格用on还是in呢,