Smiley's People

So, I've started to read John Le Carre's Smiley's People without knowing anything about Le Carre or the book. I was on Amazon searching for this book for reviews when I found out that this is part of a "trilogy" and this is the last in the series.

So now I'm faced with a dilemma -- read this book anyway and backtrack to the other books if I like it enough OR go back to the library to get the other two books first.

Decisions, decisions.

On the other hand, I can just start reading Mao's Last Dancer and forget about this book entirely.