Make the following sentence more active : five books is the series have been writing by the author

Let us assume that you meant to write:

"Five books in the series have been written by the author."

In that case, let us make the sentence more "active" (as opposed to the "passive" form in which it is written) by re-writing the sentence as:

"The author has written five books in the series."
 → This is our answer.

C. o l percieve myself and sing myeelf