All book deals should have a written agreement between the publisher and illustrator (or author/illustrator) in place before any work is started on the book content. It is not a case of agreeing to any contract put before you, but assessing the details of the agreement and discussing them with the publisher – negotiation is completely normal.
Expand allAOI can advise members on their contracts. Email us with details of the commission and publisher and any questions over the contract.