i doubt that, flippa is trademarked as "flippa" they dont own any other word associated. anyways they trade domains and websites. flippabook can be anything else related to books.
For me it's a word play on flippa -selling website and book - meaning either book value or even ebook. Could be a profitable website, however the name is not unique because of flippa already existing. I don't see any worth in this domain unless someone is flippa obsessed and needs to buy it asap. Best Regards!
Yes this what i meant on my prev comment,and im sure that "flippa" is a registered trademark,they are pretty big organization. However if you use it as Flipp-a-book that could work imo,not sure how many ppl wanna flipp their books,but maybe a marketplace for ebook?
According to TESS, flippa.com is "dead" trademark, there are only 2 active, both registered in Australia: tess2.uspto.gov/bin/showfield?f=doc&state=4010:pv68o5.2.1 tess2.uspto.gov/bin/showfield?f=doc&state=4010:pv68o5.2.2 Code (markup): Nevertheless, personally, I wouldnt invest in such domain more than $0.