KoLXo3
https://rutracker.org/forum/viewtopic.php?t=5335301
In this release you can find database of KoLXo3 library.
You need to get two files out of it:
kolkhoznik.db.rar
kolkhozkik_0.7.0_win64.rar
Put .db file in the folder.
File->Configure->Database Path->*/kolkhoznik/kolkhoznik.db
With this database, you can search for books on a topic of interest.
You find the right book, copy the hash sum (MD5), search for a file in Library Genesis libgen.is by hash sum.
You can install the KoLXo3 library on your hard disk too.
In this case you can do a full-text search and use the library locally.