the author of these books speaking at the library this weekend. is are ← action words fill in the blank with…

the author of these books speaking at the library this weekend. is are ← action words fill in the blank with the action word that matches the rest of the sentence.
Answer
Brief Explanations:
The subject is "The author of these books", which is singular. Verbs must agree with their subjects in number. So, a singular verb is needed.
Answer:
is