Sometimes you have time to read all of something, but other times you don't. When you need to save time, you might need to look at an abridged version of a book. This is also called the "Reader's Digest version" of something, because that magazine publishes many abridged pieces. Reading an abridged text may save time, but don't kid yourself: the stuff left out was important too. If you really like an author, forget the abridged version and read the whole thing.