Reading Wittgenstein's Philosophical Investigations prompted the biggest viewquake I've ever experienced, substantially changing my conception of what a properly naturalistic worldview looks like, especially the role of normativity therein. I'm not sure I'd assign it a high probability of provoking a viewquake in others, though, given his aphoristic and often frustratingly opaque style. I think it worked for me because I already had vague misgivings about my prior worldview that I was having trouble nailing down, and the book helped bring these apprehensions into focus. A more concrete scientific viewquake: reading Jaynes, especially his work on statistical mechanics, completely altered my approach to my Ph.D. dissertation (and also, incidentally, led me to LW).

The Sequences.