This book offers twenty well-known Christmas carols in two-part arrangements for piano. Songs for beginning pianists were arranged by the well-known Czech composer Emil Hradecký.  All songs are include by chords and lyrics (czech) and can be played not only on the piano, but also on keyboard instruments. You can also play and sing carols together, and accompany the pianist on guitar, ukulele and other accompaniment instruments.
The book includes a link where you can download demo recordings of the songs in the collection to give you an idea of what the songs sound like and make it easier to choose which song to learn to play first.