Books which give instructions on how to do things are very popular in the United States today. Thousands of these "How to" books are available; in fact, there are about four thousand books with titles that begin with the words "How to". One book may tell you how to earn more money, another may tell you how to save or spend it, and another may explain how to give your money away. Many "How to" books give advice on careers  . They tell you how to choose a career and how to succeed at it. If you fail, however, you can buy a book called "How to Turn Failure into Success". If you would like to become very rich, you can buy the book "How to Make a Million". If you never make any money at all, you may need a book called "How to Live on Nothing?" One of the most popular types of books is one that helps you with personal problems. If you want to have a better love of life, you can read "How to Succeed at Love Every Minute of Your Life?". If you are tired of books on happiness, you may prefer a book called "How to Make Yourself miserable?". Many of these books help people use their time better. Some people want books which will give them useful information about sports, hobbies, and travel.  Other people use their free time to make repairs and improvements on their homes. They prefer books which give step by step instruction on how to repair things like plumbing   and electrical wiring, or on how to redecorate   or enlarge a house. Why have "How to" books become so popular? Probably because life has become so complex. Today people have far more free time to use, more choices to make, and more problems to solve. "How to" books help people deal with modem life. How to books are welcomed in the United States today because  _  .
these books are cheap Americans love the writers of these books the readers can get them without paying anything these books can help the Americans deal with their problems in modern life