The Ways of the World by Robert Goddard (2015)

"Max" Maxted is a WWI veteran and former POW who plans to open a flight school on the family property. When his father dies under mysterious circumstances in Paris at the peace talks, Max is determined to get to the bottom of it. Although by the end of the book many questions are answered, more have arisen to make us early anticipate book two of this trilogy. What was Max's father really raising money for? What is the secret of Max's birth? Will his pill of a brother and sister-in-law get their comeuppance?

The Ways of the World by Robert Goddard is a throwback to those 1930s and early forties movies, often, but not always by Hitchcock, where an innocent man gets pulled into a web of espionage and hidden societies. Think The 39 Steps, The Lady Vanishes, or Ministry of Fear.