+ --id id Search by database id
+ --surname surname Search by author’s surname
+ --name name Search by author’s name
+ --misc-name misc. name Search by author’s misc. name
+ --fullname name Search by author’s full name
+ --aid aid Search by author’s id
+ -e, --ext ext Search by file extension
+ --eid eid Search by extension’s id
+ --gname name Search by genre’s name
+ --gtitle title Search by genre’s title
+ --gid gid Search by genre’s id
+ -l, --lang lang Search by language
+ --lid lid Search by language’s id
+
+By default the program prints only titles of the found book. With one
+option `-v` it also prints database id, the list of authors and genres,
+and also series the book belongs to (if any) and the serial number of
+the book in the series. With two options `-v` (`-v -v` or simply `-vv`)
+it also prints the file date and language. With three `-v` it prints
+archive name, file name, extension and size, and flag if the book is
+marked to be deleted.
+