The most books typed backwards and in their original languages using a computer with four blank keyboards and without looking at the screen is
68 (3,663,324
words, 20,680,060 characters , 24,154 pages, 266,741 paragraphs, 516,498 lines) and was achieved by Michele Santelia (Italia), in Campobasso, Italia, on 16
June 2009.
What a feat!