What two novels does Billy carry?

From the text:

I had two books with me, which I'd meant to read on the plane. One was Words for the Wind, by Theodore Roethke, and this is what I found in there:

I wake to steep, and take my waking slow. I feet my late in what I cannot fear. I learn by going where I have to go.

My other book was Erika Ostrovsky's Céline and His Vision.