Library Genesis TUI using fzf.
Using this, you can search the library genesis site (https://libgen.is), filter your book out using fzf as well as download the selected book by just pressing Enter; everything right from your terminal!

libg [OPTIONS] <search query>

OPTIONS        Description                               Allowed Values
-------        -----------                               --------------
-b <value>     Search By                                 author, title, publisher, year, isbn, language, md5, tags, extension.
-n <value>     Number of Search Results per Page         25, 50, 100.
-d <value>     Depth (Number of result pages to scan)    Any positive integer.
-s <value>     Sort Results By                           id, author, title, publisher, year, pages, language, filesize, extension.
-r             Reverse/Desecending Order

Edit $HOME/.config/libg/libg.sh to change default values:

DEFAULT_RESPERPAGE=100 # default number of search results per page (allowed values: 25, 50, 100)
DEFAULT_DEPTH=1 # default number of result pages to scan (allowed values: any positive integer)
LIBGEN_MIRROR="https://libgen.rs" # alternatives: *.is, *.rs, *.st	
DOWNLOAD_LOCATION="" # default download location (if empty then books will be downloaded to current directory)

Note: Giving any value except for 25, 50 or 100 for DEFAULT_RESPERPAGE will default it to 25.

Since it is just a small shell script, just download the script, give it executable permissions and place it in a directory that is in PATH.

The only dependency is fzf: https://github.com/junegunn/fzf.
The other dependencies are sed(GNU), awk, curl and wget but are present by default in most Linux installs.