THE AVENGERS OFFICIAL NOVELISATIONS

The Afrit Affair by Keith Laumer

Published by Berkley Medallion Books in June, 1968, this was the first US-sourced Avengers paperback, and the only one post-John Garforth to feature Emma Peel.  As far as I know, this was the only edition of it in any language.  If anybody has come across translations of it, please let me know.  If you can supply a scan of the cover even better.

From the back cover:
    JOHN STEED RECEIVED THE FIRST WARNING MESSAGE WRAPPED IN A PIECE OF KIPPERED HERRING:
    I WILL STRIKE WHEN AND WHERE I DESIRE.  SIGNED: THE AFRIT
    THE SECOND WAS SQUEEZED OUT OF A TUBE OF TOOTHPASTE:

THE AFRIT STRIKES, TRY AND STOP HIM!

Stranger and stranger things began to appear; giant footprints of a monster, murderous flying anvils, one-eared corpses, ticking bombs in the basement.  Steed and Emma Peel hastened to discover the Afrit's identity - before he made his final strike...

"THE AFRIT AFFAIR" is an original adventure based on ABC TV's world famous thriller series, THE AVENGERS. 

The Afrit Affair