Books on Jewish values often focus on what the author perceives as the mainstream of Jewish tradition, which sometimes makes for dull reading.
By contrast, Claussen focuses on areas where Jewish thinkers disagree, which makes this book more interesting. For example, a chapter on social responsibility includes (among other mini-essays) writings by an Egyptian nationalist and by an anti-nationalist, a Hasidic rabbi who suggests that some sinners are not worthy of much concern, another Hasidic rabbi who emphasizes outreach to the nonobservant Jewish masses, another Orthodox rabbi who castigates Noah and even Abraham for not adequately praying for sinners, a pro-Zionist speech by David ben-Gurion, and an attack on the Vietnam War by A.J. Heschel.
However, sometimes Claussen's tent is a bit too big for my tastes. Claussen includes a variety of thinkers whose only connection to Judaism seems to be a matter of ancestry; I'm not sure an essay by atheist Emma Goldman counts as "Jewish thought."
Also, sometimes he tries so hard to include non-mainstream views that he omits more moderate ideas; his chapter on self-restraint seems split between ascetics who believe even sex with a spouse is something to be minimized, and post-1960s progressives. Claussen could have used an essay or two from what I would today call the modern Orthodox mainstream (Shmuley Boteach perhaps?)