As the name suggests, this method calls AWS and returns information about the book represented by the ISBN number passed in.

顾名思义，此方法会调用AWS，并将传进的isbn号所代表的图书信息返回。

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For example, the urn urn: ISBN: 1-0-7666-98-0 is a URI that, like an ISBN book number, allows one to talk about a book, but doesn't suggest where and how to obtain an actual copy of it.

例如，urn urn： IS BN： 1 - 0 - 7666 - 98 - 0是一个URI，像IS BN图书编号一样，它允许您谈到一本书，但是并未指明在哪里能实际得到它的拷贝和如何得到。

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