This clearly a pirate site.

They deliver books that are copyrighted without the authors permission. They are offering to provide you with a books written and published without you having to pay for it (and without the authors and publishers getting any money for it).

It takes several years to write and publish a valuable textbook, and the authors get nothing when pirates like this provide the books for free. (Making you a thief and pirate as well when ""Take" a book for "free").

Think about this: When you "Students" that download these books from DOKUMEN for free go and get a job, I hope your employer inflicts you with "wage theft" (i.e., refuses to pay you for work you have done).

Then you will know what it's like when you have stolen books by downloading them for free from this thieving site,

And Beware. As they say "There is generallly 'No Free Lunch".

The pirates that run this site do it for a reason. You may pay later by having your info shared other bad actors that can create digital havoc in your e-world (Malware, identity theft, etc?)

Is getting a "free book" really worth this risk?