Gerald Rufus Isaacs, 2nd Marquess of Reading GCMG CBE MC TD PC QC (10 December 1889 – 19 September 1960), styled Viscount Erleigh from 1917 to 1935, was a British barrister and Liberal then Conservative politician.

He served in the First World War, earning the Military Cross in the 1918 Birthday Honours[1] and reaching the rank of lieutenant colonel.

His book The South Sea Bubble which describes the famous speculative boom and crash of shares in 18th century England, was published in 1933.

However, Reading was not included in the administration formed by Harold Macmillan in January 1957 and never returned to ministerial office.

Apart from his political career, he was also a Bencher and Treasurer of the Middle Temple and an Honorary Colonel in the Inns of Court Regiment from 1947 to 1959.