The son of David and Mary Shook, Alexander MacDonald Shook received Royal Aero Club Aviator's Certificate 2056 on 5 November 1915. On 4 June 1917, he scored the first Sopwith Camel victory of the war when he shot down an Albatros D.III. On 22 March 1918, he shot down an Albatros D.V flown by Bertram Heinrich of MFJ 1. He was promoted to temporary Major on 1 July 1918. Shook was transferred to the unemployed list on 28 March 1919.
Great Britain, Royal Aero Club Aviatorsí Certificates, 1910-1950
Distinguished Service Cross (DSC)
Flt. Cdr. Alexander Macdonald Shook, R.N.A.S.
Flt. Lieut. Arnold Jaques Chadwick, R.N.A.S. (since reported drowned).
Flt. Sub-Lieut. Albert James Enstone, R.N.A.S.
Flt. Sub-Lieut. Langley Frank Willard Smith, R.N.A.S. (since missing).
For exceptional gallantry and remarkable skill and courage whilst serving with the R.N.A.S. at Dunkirk during May and June, 1917, in repeatedly attacking and destroying hostile aircraft.