The complement in the sentence is the noun novel (or the noun phrase an English novel).
A complement is a word that restates the subject or direct object of a sentence.
A subject complement may be a noun, a noun phrase, a pronoun, or an adjective that follows a linking verb.
A linking verb acts as an equal sign; the subject is or becomes the object (A Christmas Carol = novel, or an English novel).
- A noun, noun phrase, or pronoun complement is called a predicate nominative.
- An adjective complement is called a predicate adjective.
The noun "novel" (or the noun phrase "an English novel) is a predicate nominative, a type of subject complement.