Available at Amazon.
The Thirty-Nine Steps is an adventure novel by the Scottish author John Buchan. It first appeared as a serial in Blackwood’s Magazine in August and September 1915 . . . It is the first of five novels featuring Richard Hannay, an all-action hero with a stiff upper lip and a miraculous knack for getting himself out of sticky situations. (Wiki)
Read more about John Buchan here.
Alfred Hitchcock’s movie is on youtube.