Book 1

Murder on the Thirty-First Floor

by Per Wahlöö, Sarah Death
Jul 12, 1982
English
Paperback (207 pages)

31-ე განყოფილების დაღუპვა

by Per Wahlöö, ნოდარ ძოწენიძე
Jan 1, 2010
Georgian
Paperback (197 pages)

Crima de la etajul 31

by Per Wahlöö, Gh. Ghemiușliu
Jan 1, 1969
Romanian
Paperback (158 pages)

Book 2

The steel spring

by Per Wahlöö, Joan Tate
Jan 1, 1970
English
Paperback (188 pages)