So I'm about half way through it now. I'm really impressed with how much information it's conveying in a succinct form. I'm going through Clojure for the Brave and True, and think this supplements it nicely.

There are a few typos, but the most glaring one was the incomplete python code underneath the "Code Structure" heading:

l = [1, 2, 3, 4, 5]

for i in l i = i*i

for i in l if (i mod 2 == 0)

print l

I assume the author wanted to show how the list was mutated. And those conditionals need trailing colons :)