Arrange the cards as follows during the normal action and normal riddle difficulty settings:
Northwest position: Eye Of The Night Northeast position: Moon West position: High Priestess East position: Fool South position: Hanged Man
Arrange the cards as follows during the hard difficulty setting.
Northwest position: The High Priestess North position: The Eye Of The Night Center position: The Fool East position: The Moon Southwest position: The Hanged Man
The riddle is a problem with Roman numerals. The Priestess is number II (2) as read on the book about tarots, the Eye Of The Night is XXII (22), the Fool is 0, the Moon is XVIII (18), and the Hanged Man is XII (12). Look in the book of drawings to see that XVIII can stay only in the east position (the last letter is I instead of L); XII is only in the southwest position; II is only in the northwest position; 0 and XXII have two places where they can stay. Swap them until you find their correct place.
During the easy difficulty setting, simply look at Alessa's Drawing book for drawings representing the different cards and where they should be put on the door.