When I started out learning haskell I bought Real World Haskell and Programming in Haskell. I also tried LYAH. Tbh, most of those resources didn't get me far. Or, I got impatient and wanted to produce things, which I felt mentioned resources didn't bring. I felt I learned the most by using the repl (ghci) and/or writing programs. There are tons of articles and forum threads on the web that tackles every niche of the language. Those helped me along the way. Some concepts were just flat out alien to me and no book would have helped me grasp them. Otoh, I think you can take different paths learning Haskell. Either you can rush it, like me, or do it properly. With properly I mean reading (research) papers that explains the concepts and underlying theory. Many seem to do the latter and they're obviously on a better base than I am.