I have been reading this book
in online form for the past month and got the hardcopy a few days ago. Two thirds through, I can confidently say that this is the best Haskell book I have read.
From the Jolt Awards Site:
"How are the winners selected?
Our judges not only examine the standard criteria of audience suitability, productivity, innovation, quality, ROI, risk and flexibility, but also seek to honor products that are ahead of the curve. Jolt-winning products are universally useful; are simple, yet rich in functionality; redefine their product space; and/or solve a nagging problem that has consistently eluded other products and books."