Murakami, buy-one-get-one-free option. Two stories told through alternating chapters.
The first one is based, as usual in Murakami's novels, in a slightly dystopian version of modern day Japan, where two powerful organizations are fighting an all-out cyber-war, and a band of invisible mutants roam around a web of tunnels connected to Tokyo's subway system.
These books offer two different approaches to anyone who wants to be introduced to western philosophy. They both range from the Greek Pre-Socratics to contemporary German, French and English speaking thinkers. One of them even gets to talk about the Big Bang Theory.
