How do you know the government had "enough" evidence to convict? That's the jury's job to decide and as we've seen in some cases for some defendants nothing is "enough". Saying ahead of time that the police had "enough" is a silly thing for the court to do and they know better.
I call it Sandy by a nose...so far!
Seriously, a book IS just another object(like a hammer), BUT it does seem the cops are attempting to obscure their incompetence by 'inking' the waters.
There should be a Constitutional Amendment protecting secondhand book stores. ;^)