These two are the most recommended where I work: https://www.manning.com/books/functional-programming-in-scala https://www.manning.com/books/functional-program

These two are the most recommended where I work: https://www.manning.com/books/functional-programming-in-scala https://www.manning.com/books/functional-programming-in-scal... https://leanpub.com/fpmortals/read https://leanpub.com/fpmortals/read