I've looked on Google Books' preview and it reads quite smoothly.

I was surprised that Google's price is so much lower than Amazon's though? Less than a half? (Might be locale-dependent, I'm in Poland). It has been long since I bought anything on Google, but I assume it can still be converted to a DRM-free epub like described here?: https://www.reddit.com/r/kindle/comments/3menci/i_prefer_my_...

Where's the catch?