Как это читается?
Some years later, he lost his voice completely. Unfortunately, he was in the middle of writing a book at the time and suddenly had no way to communicate other than blinking. Today, a computer system on his wheelchair enables him to speak. Of his many books, A Brief History of Time is Stephen's bestseller.

Читается примерно так (приближённая русская транскрипция английского произношения):

Some years later, he lost his voice completely.
Сам йиэрз лейтер, хи лост хиз войс комплитли.

Unfortunately, he was in the middle of writing a book at the time and suddenly had no way to communicate other than blinking.
Анфёрчэнэтли, хи уоз ин зе мидл ов райтинг э бук эт зе тайм энд садэнли хэд ноу уэй ту кэмуникейт азэр зэн бликинг.

Today, a computer system on his wheelchair enables him to speak.
Тудэй, э компьютер систем он хиз уилчэа инэйблз хим ту спик.

Of his many books, A Brief History of Time is Stephen's bestseller.
Ов хиз мэни букс, э бриф хистори ов тайм из Стивенз бэстселлер.