Selling digital copies of those books could become profitable, and there are questions over who will get those profits.

VOA: standard.2009.12.31

However evil those books are in and of themselves, we have to read them so that we might see and know and yet abstain.

但是邪恶也藏在这些书中，我们不得不读它们以便能看到并了解它们然后将之弃绝。

耶鲁公开课 - 弥尔顿课程节选

Both of those books are available at the bookstore.

这两本书在书店都有卖的

耶鲁公开课 - 博弈论课程节选