。
Books can be classified into good ones and bad ones.
Literal
Books [topic-は] good things [conjunctive-と] bad things [conjunctive-と]-[target-に] classify-can.
A twin-と pattern used for exhaustive listing, with both items marked by と before the final に attaches to the classification target. This exhaustive-list と differs from non-exhaustive や (which implies 'and others'). 分類できる is the potential form of 分類する ('classify').