If you’re new into role-playing games, then this is a pretty good deal.
The core rulebooks for both Pathfinder and Starfinder for around a fifteen euro.
Pathfinder itself comes from Dungeons and Dragons, being a port from DnD 3.5, though the second edition is move away from that original starting point.
The basic concepts remain similar between the two games with similar races, classes and mechanics.
https://www.humblebundle.com/books/give-gift-pathfinder-starfinder-paizo-books