At least, you should be serious enough to plough through hefty books in which the writing style ranges from «detailed» to «convoluted». (tradingsetupsreview.com)
So far they're rather hefty books, not good for my challenge (goodereader.com)
Amazon on Monday launched Kindle textbook rentals for the 2011 school year in a move that aims to dent college bookstores as well as hefty book prices. (zdnet.com)