Do you just want to be able to access the ebooks on your Bookshelf separately from your print books, or do you want to be able to separately search your Bookshelf for ebook recipes? If the former, you already have that capability by using the new Only Show/eBooks filter.
By the way, if we've indexed a cookbook title you own as an ebook, we will have linked the ebook to the print "master"/indexed version, so you'd be able to search those indexed recipes once you add the ebook to your Bookshelf. (We don't designate ebooks as master editions in the EYB Library unless that is the only version in which the title has been published.)