Copying from 1 tax book to another

SUGGESTED

I currently have an internal book and 6 tax books in a company.  Each month I load the additions using an import template.  Throughout 2015, many assets were not loaded into one of the tax books.  Now I want to copy all assets in one tax book to the 2nd book that did not get updated completely.  Is there a way to do that in bulk?  I could use "apply book defaults", but I believe I would have to do that for each individual asset.