Correspondence should be sent to the following address:

Publishing House Tetragon sp.z o.o.

Żelazna 41 lok. 21

00-836 Warsaw

Mail: kontakt@tetragon.com.pl

Facebook: @wydawnictwotetragon

Messenger (the fastest form of contact): m.me/wydawnictwotetragon

Account number: 58 1240 6292 1111 0010 4425 4219