You will be given a definition of a task first, then some input of the task.
In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

During his career , he mainly worked on literacy in both theoretical and applied perspectives , and is perhaps best known for his book " Literacy in Theory and Practice " ( 1984 ) .
Output:
He was perhaps best known for his book " Literacy in Theory and Practice " ( 1984 ) .