Seeking contact regarding permission to use Sketchup for Schools in a book series


I am in the process of writing a series of grade 1 - 9 computing books on behalf of Macmillan Publishing that will be released in a number of territories including the Caribbean, South Africa and Argentina. I would like to use Sketchup for Schools in the book series but Macmillan are unable to find any information about the use of the software for this purpose.

If you could get back to me as a matter of urgency I would appreciate it as I will need to rewrite the units that use Sketchup for Schools with alternative software if we are unable to gain permission.

Many thanks for your help.