Info should sync completely between "Items" in Books and "Products" in CRM.
Information such as Manufacturer and Product category should sync between Items(in Books) and Products(CRM)
it should also display the info when you are trying to create an Invoice and selecting the items for the invoice.
for example if I sell Potato chips but I have three different brands I should be able to tell which is which when I am selecting them in the "Item Details search box"
currently it would display "Potato Chips" three times but I would have no way of knowing which is which because it doesn't display info such as manufacturer