What is the best non-guide Camino de Santiago book?

Camino de Santiago book
Camino de Santiago book

The question was:

I have read over 13 personal accounts and spiritual books now on the Camino. I want to continue on but want to be a little more selective on what I choose to read. […] What others are on your top five list?

Read the list of this pilgrims 13 most favorite books, and the responses from the rest of our pilgrim communities.