I have some serious mystery/thriller suggestions for your reading pleasure!
June
The Death of Lucy Kyte by Nicola Upson: When beloved British mystery author Josephine Tey inherits a rural cottage from her godmother, she finds herself tasked with unraveling a chain of secrets linking the present and the past.
JulyIce Shear by M.P. Cooley: Widowed FBI agent June Lyons returns to her hometown to work for the local police department. When she discovers a body in the frozen river, the investigation unmasks a sordid maze of nefarious deeds.
September 
Angel Killer by Andrew Mayne: FBI agent Jessica Blackwood believes she has successfully left her old life as a rising star in the magic world behind her until the Bureau encounters a killer whose crimes are so baffling, some think he’s supernatural.
The New Agatha Christie Hercule Poirot Mystery by Sophie Hannah: For the first time ever, the guardians of Agatha Christie’s legacy have approved a brand-new novel featuring Hercule Poirot! In the hands of internationally bestselling author Sophie Hannah, Poirot plunges into a mystery set in 1920s London — a diabolically clever puzzle sure to baffle and delight all readers.
– Annie