The Warrior Poets encapsulated in 5 books

If we could encapsulate the soul of The Warrior Poets in 5 books, they would be: "Being Peace" (Thich Naht Hanh); "Dancing in the Streets" (Barbara Ehrenreich); "The Courage to Teach" (Parker J Palmer); "Walkabout" (Bruce Chatwin); "The Brief and Wondrous Life of Oscar Wao" (Junot Díaz); and "Letters to a Young Poet" (Rainer Maria Rilke).

You are right, that was 6 books.  But who are we to tell Rilke he didn't make the cut.