Ignatius, David. Phantom Orbit. Norton. May 2024. 400p. ISBN 9781324050919. $29.99. THRILLER

In his return to thrillers, after 2020’s The Paladin, best-selling Ignatius combines space warfare and an unsolved puzzle in the writings of 17th-century astronomer Johannes Kepler. Russian Ivan Volkov discovered Kepler’s clues and has been secretly working on them for years, until he contacts the CIA with a cryptic invitation.

Moore, Graham. The Numbers Man. Random. May 2024. 384p. ISBN 9780593731925. $30. THRILLER

Best seller and Academy Award winner Moore (The Holdout; The Imitation Game) sets his newest in 1939, as tax attorney Ansel Luxford enlists in a secret mission to crash the Nazi economy. Warfare through finance is a dangerous game, involving J.P. Morgan, John Maynard Keynes, spies, and great peril near and far.

Reich, Christopher. Matterhorn. Thomas & Mercer: Amazon. May 2024. NAp. ISBN 9781662516542. $28.99. THRILLER

In a small alpine village, Mac Dekker tends his cows, safe in his retirement from the CIA. When his son, also a spy, dies, Mac sets off up the mountain, on the heels of terrorists and a slew of double agents. This is award-winning Reich’s (Simon Riske series) first stand-alone in nine years.

Simmons, Dan. Omega Canyon. Little, Brown. May 2024. 448p. ISBN 9780316198905. $28. THRILLER

It has been almost a decade since Hugo, Stoker, and World Fantasy Award–winning Simmons (The Terror) has published a book. His return is a WWII double-agent thriller featuring a German physicist working on the U.S. atomic bomb project who is forced to spy for the Nazis.