The cover illustration is not very inviting, but the reviews and blurbs in more than one newspaper make it sound worth the read:

Not really a dictionary, but a series of short essays on such topics as equality, Hell, miracles, religion, tyranny and superstition by one of the leading spirits of the Enlightenment. The tone is witty, catty, and there are many neat aphorisms such as: “Atheism does not prevent crimes, whereas fanaticism commits them.”

Incidentally, in case you are already a Voltairophile, you may want a deeper well from which to draw inspiration.  In which case you may want to pay a visit to Oxford.

You do not need to go all the way there.  You can start with a visit to the website of the Voltaire Foundation. But if you want an extra excuse to go to Oxford, its director Nicholas Cronk (who wrote the Introduction and Notes to the Pocket Philosophical Dictionary), makes a visit to that lovely place worth the effort if you have the opportunity to hear him lecture on Voltaire.