Social Sciences. In short, a two-mode is a hybrid vehicle that can operate in two distinct ways (modes). The first mode works much like a regular full hybrid. It is the second mode that makes the difference--where the hybrid system can adjust varying amounts of engine and motor function to meet very specific vehicle/task/traffic requirements.
Twain's first book, The Innocents Abroad, was published in 1869, The Adventures of Tom Sawyer in 1876, and The Adventures of Huckleberry Finn in 1885. He wrote 28 books and numerous short stories, letters and sketches. Mark Twain passed away on April 21, 1910, but has a following still today.
This number will depend on the number of buyers. Some self-published authors are very successful. According to USA Today, thriller novelist Michael Prescott has sold more than 300,000 copies of his self-published e-books by pricing them at 99 cents per copy. The author has earned more than $300,000 from book sales alone.