John Buchan
A Scottish novelist, historian and Unionist politician who served as Governor General of Canada, the 15th since Canadian Confederation (<a href=https://en.wikipedia.org/wiki/John_Buchan>Wikipedia</a>).
Works (50)

The Thirty-Nine Steps

Witch Wood

Midwinter

The house of the four winds

Greenmantle

Mr. Standfast

The power-house

Island of Sheep, the

The Free Fishers

Salute to Adventurers

Huntingtower

Prester John

Faeries

The three hostages

The gap in the curtain

Castle Gay

The dancing floor

Memory hold-the-door

The Magic Walking-Stick

The half-hearted

A prince of the captivity

The Path of the King

Augustus

The Courts of the morning

Sick Heart River

John Burnet of Barnes

Oliver Cromwell

The blanket of the dark

John Macnab

The four adventures of Richard Hannay (The Thirty-Nine Steps / Greenmantle / Mr. Standfast / The Three Hostages)

The Runagates Club

The Watcher by the Threshold and Other Tales

Buchan's war

To catch a spy
1965

Pilgrim's way

A history of English literature

A lost lady of old years
1899

The last secrets

High stakes and desperate men

The northern muse

Poems

Francis and Riversdale Grenfell

The moon endureth

The Complete Richard Hannay ( Island of Sheep / Three Hostages / Mr Standfast / Greenmantle / The 39 Steps)

The long road to victory

The Best Supernatural Stories of John Buchan

Supernatural Tales

Julius Caesar

Montrose

The King's Grace