What is appositive phrase in this sentence The book was signed by the author Bob Huylett?

The appositive phrase in the sentence "The book was signed by the author Bob Huylett" is "Bob Huylett".

Here's why:

* Appositive phrases are words or groups of words that rename or explain a noun or pronoun that comes before them.

* In this case, "Bob Huylett" renames the noun "author".

* It provides additional information about the author, telling us their name.

Let me know if you'd like more examples of appositive phrases!