修饰问题

At their best, they are works of art and there is a tactile pleasure inbooks necessarily lost in e-book versions.老师这个in book是状语表示在书中存在能触知的快乐？那lost是过去分词作后置定语修饰哪个？为何用过去分词哪个是他逻辑主语？in e-bookversions又是什么成分修饰哪个？

At their best, they are works of art and there is a tactile pleasure in books necessarily lost in e-book versions.

1. a tactile pleasure in books ：纸质书本中有些触觉乐趣。

2. lost in e-book versions：过去分词短语作 pleasure 的定语。意为 “电子版本中势必找不到的（乐趣）”