Thinking Functionally with Haskell, Richard Bird, 2015 [0] states The first edition was titled 'Introduction to Functional Programming', and was co-authored wit

Thinking Functionally with Haskell, Richard Bird, 2015 [0] states The first edition was titled 'Introduction to Functional Programming', and was co-authored with Phil Wadler. It was published in 1988. This is the one linked and free available. The second edition was titled Introduction to 'Functional Programming using Haskell', published in 1998. The 2015 edition is also available from safaribooksonline [1]. [0] https://www.cs.ox.ac.uk/publications/books/functional/ https://www.cs.ox.ac.uk/publications/books/functional/ [1] https://www.safaribooksonline.com/library/view/thinking-functionally-with/9781316189986/ https://www.safaribooksonline.com/library/view/thinking-func...