I think the most extensive and the best walkthrough for learning QlikView is the book QlikView 11 for Developers by Miguel Garcia and Barry Hamsen. After reading it, you can focus in more specific topics.
For example if you want to focus on server/publisher topics a book that is highly recommendable is QlikView Server and Publisher by Stephen Redmond.
Also if you want to check specific examples about QlikView visualizations you can check the book Learning QlikView Data Visualization by Karl Pover, so you can get a better idea of how to translate raw data to a dashboard that generates real value to companies. If you're interested in visualization, you may as well check Stephen Few material.
Besides all that, you can find on the web several QlikView blogs written by experts and also visiting often this community would be very useful not only to get answer to your doubts but for learning from other people's issues and also can be a challenge for yourself to try answering questions posted here,
