The Rosenberg Group will only receive commissions on contracts it negotiates. If a book of yours goes out-of-print and the rights revert back to you, a new contract would have to be negotiated for that book to begin generating revenue again. "Perpetuity" in my Agreement relates to the length of time my participation in the revenues from the contract I negotiated stays in effect. Once the rights have reverted back to the author, he or she may choose to seek other representation for their work.