fast.ai link actually points to http://book.realworldhaskell.org/ http://book.realworldhaskell.org/ What gives? Edit: having read to the end, there's a mention

fast.ai link actually points to http://book.realworldhaskell.org/ http://book.realworldhaskell.org/ What gives? Edit: having read to the end, there's a mention of Haskell book, so just an editing error then.