Comment 3 for bug 2063894

I don't understand. Invert what search? Do you want to do a search "marked:false" instead of a select all? It would be helpful if you provided a complete set of steps you use now to accomplish what you want.

I understand "toggle for unmarked books" to mean "set unmarked books to marked". Since setting an already marked book to marked does nothing, this is the same as choosing "mark selected books".

Note that you can invert a search of any complexity by putting the search expression in parentheses and typing "not" at the front, as in "not (marked:true)"