Meanwhile there are a lot of books and literature available to QlikView and Qlik Sense, therefore following a list of the published material. Most of the books are published by Packt Publishing otherwise you could go to the bookshop you are trusted.
The books are mostly written in english but there are some in spain and portugese, too and they are with quite averagelanguage skills understandable enough.
Which book is the right one for me? This couldn't be said in general then your present knowledge to Qlik and BI topics and your main-goals (administrator, developer, user) in the use of Qlik will be very different. The order from the listing isn't chronological, alphabetically or valueing. It's simplythatmypersonal preferences (listings in grey are in planning or not read from me).
Therefore is my suggestion before you buys to read carefully the description from content and target group and also to consider several books. From each book you will get ideas, suggestions, insights and/or the confirming of your previous work.