This book may not be _____ in whole in part in any form without the written permission of the publishers.
This book may not be _____ in whole in part in any form without the written permission of the publishers.
Explanation
The sentence is in the passive voice and refers to the book being reproduced in some way, so the correct form of the verb is "reproduced."
The complete sentence would be:
"This book may not be reproduced in whole or in part in any form without the written permission of the publishers."