We have enabled books and CRM integration 

The Account Owner in CRM, should be assigned as the Customer Owner in Books, but this is not the case 

You have go to books and manually assign the Customer Owner again 

If you change the Account Owner in CRM, again you have to go Books and change the customer owner manually again

This is redundant, time consuming and frustrating. 

It should be done automatically or at the very least an option should be available to sync them.