Which two should I take with me on a cruise?

I’m going on a cruise soon and am trying to decide which two books to take with me from my “to read” list. I’m open to other choices as well. The choices are as follows:

1.  A Canticle for Leibowitz – Walter M. Miller Jr.
2.  Ilium – Dan Simmons
3.  The Pillars of the Earth – Ken Follett
4.  All the Light We Cannot See – Anthony Doerr
5.  The Blade Itself – Joe Abercrombie
6.  Leviathan Wakes – James S. A. Corey
7.  Wolf Hall – Hilary Mantel
8.  Angels & Demons – Dan Brown
9.  Babel – R. F. Kuang