Need help in understanding this question from sample hsk question
而时间是有限的， 所以不但要会读书，而且还要会选择其中的好书阅读。


In this context:

要: need; 

会: know how (to); 

A rough translation:

Well, time is limited, so we need not only know how to read books but also know how to pick good ones among (all kinds of) books to read.