KELI publishes a bimonthly magazine, Dia Regno,[2] which started to appear regularly in 1908, when the German Paul Hübner was sure that five people would subscribe.
Now the magazine serves as a tool among members in 48 countries from diverse faiths including Quakers, Lutherans, Calvinists, Anglicans, Adventists and people following Eastern Orthodoxy.
In 1971, KELI had an official hymnal "Adoru Kantante" (Worship by Singing) with 262 songs (mostly classics), from many countries and languages, with four part harmony - a beautiful book, done professionally.
Adoru,[3] an ecumenical worship book co-edited with the catholic association IKUE, containing texts, prayers and hymnals appeared in June 2001.
More and more, because of good communication with IKUE, the Roman Catholic Esperanto-Union, the annual conferences happened together,[2] for the first time in 1968 in Limburg/Lahn.