He is an important character in all five of the series' books.

I think that series books are comfort food for the mind.

It was the highest-selling regular series book of the 2000s.

Many of these series books may be published in a numbered series.

The series three book will be in print in early 2011.

For those who wonder about the popularity of series books, that's the answer.

There are those who disparage children's series books as a new and dangerous development, but they actually have a long, successful history.

Actually, there are three kinds of series books, and what you write about depends on which kind you're creating.

In many of the series' books he fights against Arab enemies, and always wins.

Lockridge's various series books take place in a shared universe.