Looking at the search manual, I don't suppose there's anything like subqueries to express things like
- all books authors by authors of whom i've read at least three books and rated > 3 stars (I have a column to mark books as read) or
- all books that are part of a series of which I have read at least one book
or is there? Does the manual cover the potential of the search language or are there a lot of exciting "extras" to be found in the underlying manual of the programming language?
I would find the kind of queries quite helpful to get back to an author or series after a while.