Two-and-a-half months after Liberty Media’s initial offer to purchase Barnes & Noble for $17 a share (or just over $1 billion), the NY Post claims the deal now “looks shaky.” Or it may simply be a delay in the initial timetable, as “a deal failed to materialize last week, which was a preliminary target for a final deal since talks began in May, according to sources.” Drawing on a single, unnamed source, the paper says “at least one private-equity giant this week hired a consulting firm to take a fresh look at B&N’s books in case their deal falls apart.” […]