Considered a "maverick publishing genius",[1] he was noted for his phenomenal drive and energy, his innovative business ideas and also for his prolific output as an author.

He moved to London in 1939, where, among other business ventures, in 1940 he started Reveille, which was originally the official newspaper of the Ex-Services' Allied Association.

Published every Wednesday, they contained a complete and unabridged best selling novel in a 24-page newspaper format with some advertising and were sold for sixpence through newsagents.

[3] In these: "He bought reprint rights in existing printed novels and published them each week in tabloid newspaper format without any form of binding or stapling and with line drawings as illustrations... His venture was under-capitalised and had to close after some twenty or so issues had appeared.

"[1] In 1954, after Weekend Novels closed, Landsborough returned to Hamilton’s as editor of their Panther Books imprint, which would go on to become one of the leading British paperback publishing houses.

[4] Michael Geare, who was employed by him in 1957 as sales manager, said of him: "He was a gifted, clever, likeable chap, and really knew everything about book publishing.

[3] Like many well-known authors during those economically tough post war years, he wrote genre novels under pseudonyms for the rapidly growing paperback market, to augment his income.

In 1971–73 he worked on freelance publishing ventures involving tourism and travel in Hong Kong and Australia, including the establishment of LookEast magazine.

He had five children by his marriage to Louvain (Peggy) Hussey: Drew, Stuart (proprietor of Puzzling World in Wānaka, New Zealand), Diana, Bonny and Euan.