Biggles and the Plot that Failed - Captain W.E. Johns 1965 - Brockhampton Press, Leicester - First Edition A fine copy and thus scarce.

Biggles and the team are stuck in the Sahara trying to track down the missing son of a friend of Raymond.

The son, Alex Mander, has joined a partner, Sekunder, seeking treasure in a lost tomb. When the tomb is found Alex is deserted by his partner and left to die. Biggles and co find him just in time, and just before his partner returns with a drill to open the tomb.

In his haste to open the tomb the partner is stung by a scorpion. Biggles takes him back to civilisation, not before helping Alex open the tomb and determine there is nothing in it!
  First Edition Points - Copyright page stating ‘First Edition 1965’, cloth boards (a number of later editions had laminated boards, but with no statement of later printing). Biggles list on dust jacket ends with ‘Biggles and the Plot That Failed’ plus three Gimlet books. .

Reference - YABS.

pp. 184. In publisher’s pinkish red cloth, spine lettered in gilt. Dust jacket priced 8/6 net to lower corner of front flap.
  Condition: Fine in near fine jacket with hint of rubbing to head of spine, not price clipped.   Ref: 105573   Price: HK$ 3,000