Everyone who has an active Type Classes subscription as of today can get the book for free on Leanpub. If you’ve been issued a coupon, on your account page you can find a link under the section entitled “Leanpub coupons”. The link can be used twice, so you can give a copy to a Haskell-curious friend.
Finding Success starts out at a very beginner place and then ramps up at a fairly quick pace, as you can see from perusing the chapter list:
Although not intended as a thorough introduction to Haskell, it is sufficiently self-contained so that an ambitious Haskell novice can get through the entire thing. We don’t dwell on the formalities of Applicative and Monad, but rather keep a practical focus on how they help improve the motivating project that we iterate upon throughout the book.
The book is currently in early access but complete enough to start reading now. Our major remaining tasks are: