Using GUI much better for long-term,
for bulk process... i think better adding per author, per series, per genre,
for search, running calibreserver much faster i think, or, load by COPS.
i like to add empty books with red column coloring.
add unpublished books as blue, and wishlist by green color.
Useful GUI..
for command-line, if i am using it frequently, i think i can be faster,
what if i dont remember the line or command.
that be different.
maybe someone created video about it..
i found something... this video search using list command
https://www.youtube.com/watch?v=FeoVsC4U_0A