Ngram textbooks.google.com/ngrams/… shows that "to master more" was more common than "for more information" around 1987. Sorry, I do not learn how to set back links in comments. Have a Kindle! I’m a huge fan of my Kindle – it’s just the most effective for no-distraction reading and so portable. https://get-more-information35689.blogpixi.com/33274141/getting-my-here-to-work