Added more Haskell reference books (#18628)

client/src/pages/guide/english/book-recommendations/haskell/index.md

@@ -1,11 +1,24 @@
 ---
 title: Books on Haskell
 ---
- ### List of Books
+### List of Books
 
+#### Learn You a Haskell for Great Good!
 *Learn You a Haskell for Great Good* is one of the best books for beginners diving into the world of Haskell. Full with illustrations.
  
  And yes, the e-book is free!
 - [Website](http://learnyouahaskell.com/)
 - [No Starch Press](https://nostarch.com/lyah.htm)
 - [E-book](http://learnyouahaskell.com/chapters) (free)
+
+#### Programming in Haskell
+*Programming in Haskell* by Graham Hutton is a very recommended book too, written by a programming professor that also puts slides, code examples and even exams and answers available for free in his webpage and the publisher's.
+
+- [Website](http://www.cs.nott.ac.uk/~pszgmh/pih.html)
+- [Cambridge University Press](https://www.cambridge.org/es/academic/subjects/computer-science/programming-languages-and-applied-logic/programming-haskell-2nd-edition)
+
+#### Haskell Programming from first principles
+*Haskell Programming from first principles*, by Cristopher Allen and Julie Moronuki, is a very thorough source for everything Haskell, including a good introduction to Lambda calculus, the underlying Haskell foundational concept. The book is only available in electronic format, but it's still widely acknowledged as an excellent source, which stands with more than 1200 pages of content.
+
+- [Website](http://haskellbook.com/index.html)
+- [Gumroad](https://gumroad.com/l/haskellbook)