2 Authors Say Routledge Recycled Their Work Without Credit

When William E. Deal casually flipped through Theory for Performance Studies: A Student's Guide, published this year by Routledge, he noticed a few familiar sentences. After taking a closer look, Mr. Deal, a professor of religious studies at Case Western Reserve University, discovered whole paragraphs and even entire pages that had been lifted directly from a book he co-wrote, Theory for Religious Studies, published by Routledge in 2004.

"My jaw dropped," he