Can someone explain to me what the implications of this trademark could be? Would that mean that a store that sells books and would have the word Book in their logo or brand could expect a lawsuit?
trademarks are market specific. You could be a bookstore called "whatever book" and be fine. You could not be a social network and call yourself "whatever book". The general idea is to prevent things from being associated with a brand in the consumers mind when that thing has no right to the association.
Some of the markets they're applying for seem a little questionable. Looks like they're trying to claim far more than just social network.
* Downloadable e-commerce computer software to allow users to perform electronic business transactions via a global computer and communication networks
* Magnetically encoded gift cards;
* Software for accessing and viewing text, images and electronic data relating to conferences in the field of software development;
* Software for making reservations and bookings;
* Software for ordering and/or purchasing goods and services
* Software to enable accessing, displaying, editing, linking, sharing and otherwise providing electronic media and information via the internet and communications networks
> * Software for making reservations and bookings;
The word BOOKing should be a giant flag that they're trying to trademark the generic name there. Reservation book, order book, etc all come from physical books. It would be a giant stretch to try to trademark book for software covering those things.
I'm not that familiar with trademarks and such.