Can someone translate this librarian note?

[☕ Lachgas ♿]

Can someone please translate the note ot that book https://www.goodreads.com/book/show/1...?
I don't know which language it is and Google translate says polish but couldn't translate it in german.
And if it's something relevant for librarians just put it there in english?

Thanks!

[Emy]

"I unified the title of [Rakietowe Szlaki] throughout the series." I am not going to add the translation as it would then put the note under my name, which would be inaccurate if someone needed to communicate with the Librarian/creator of the note.