If you liked those books (only if you liked them!) a suggested payment of 5 euro (or whatever you consider those books to be worthy) can be done for:
Mioc Marius Remus
Bank account: RO18CECETM0102RON0020002
open at CEC Bank Romania, Timisoara branch
Other books of Marius Mioc (mainly in Romanian language) are available at https://mariusmioc.