Young Harriet and her brother, Austin, have always been scared of the quarry where their stonemason father works. So when they find him dead on the cold ground, they scarper quick smart and look for some help. When help arrives, however, the quarry is deserted, and there is no sign of the body. Were the children mistaken? Is their father not dead? Did he simply get up and run away?

The Woman Unknown: Deirdre Fitzpatrick is married to a man who wants to know where she really goes when supposedly taking care of her sick mother and calls on the expertise of Kate Shackleton, amateur sleuth extraordinaire, to investigate. The Gentleman: Everett Runcie is a banker facing ruin and disgrace. His American heiress wife will no longer pay for his mistakes or tolerate his infidelity and is seeking a divorce.

Take one quiet Yorkshire Village, add a measure of mystery, a sprinkling of scandal and Kate Shackleton - amateur sleuth extraordinaire! Bridgestead is a quiet village: a babbling brook, rolling hills and a working mill at its heart. Pretty and remote, nothing exceptional happens...except for the day when Joshua Braithwaite goes missing in dramatic circumstances, never to be heard of again.

When amateur sleuth detective Kate Shackleton receives a dawn telephone call from her cousin, James, his news soon snaps Kate into wakefulness. The India office seek her on-the-spot help in finding a maharajah last seen on the Bolton Abbey estate. He has with him a hugely valuable diamond. Investigative successes and good family connections put Kate in the highly trusted category. Perceived as 'establishment', Kate feels like an outsider in her sympathies.

Kate Shackleton's sterling reputation for courageous sleuthing attracts the attention of the venerable Lady Coulton. Hidden in her past is a daughter born out of wedlock and given up to a different family. Now Lady Coulton is determined to find her and puts Kate on the case. But as Kate delves deeper into Lady Coulton's past, she soon finds herself thrust into a scandal much closer to home.

1929, London. In the darkness before dawn, a London railway porter discovers a man's body as he unloads a special goods train from Yorkshire, all means of identification stripped away. Hitting a dead end, Scotland Yard call on indomitable sleuth Kate Shackleton, hoping her local Yorkshire knowledge and undoubted skills at winkling out information will produce the results they need. 1929, Yorkshire. Fears of unrest in the Yorkshire coalfields mean that Kate must conduct her investigation with the utmost secrecy.

Nothing ever happens in August, and tenacious sleuth Kate Shackleton deserves a break. Heading off for a long-overdue holiday to Whitby, she visits her school friend Alma, who works as a fortune-teller there. Kate had been looking forward to a relaxing seaside sojourn but upon arrival discovers that Alma's daughter, Felicity, has disappeared, leaving her mother a note and the pawn ticket for their only asset: a watch-guard. What makes this more intriguing is the jeweller who advanced Felicity the 30 shillings is Jack Phillips, Alma's current gentleman friend.

Yorkshire, 1927. Eclipse fever grips the nation, and when beloved theatre star Selina Fellini approaches trusted sleuth Kate Shackleton to accompany her to a viewing party at Giggleswick School Chapel, Kate suspects an ulterior motive. During the eclipse, Selina's friend and costar Billy Moffatt disappears and is later found dead in the chapel grounds. Kate can't help but dig deeper and soon learns that two other members of the theatre troupe died in similarly mysterious circumstances in the past year.

When the landlord of a Yorkshire tavern is killed in plain sight, Freda Simonson, the only witness to the crime, becomes plagued with guilt, believing the wrong man has been convicted. Following her death, it seems that the truth will never be uncovered in the peaceful village of Langcliffe. But it just so happens that Freda's nephew is courting the renowned amateur sleuth Kate Shackleton, who decides to holiday in Langcliffe with her indomitable teenage niece, Harriet.

Kate Shackleton arrives at the garden party with her niece Harriet to celebrate the success of newly crowned Yorkshire Brewery Queen Ruth Parnaby. As companion to Ruth, Harriet explores the brewery but it's Kate who opens the wrong door, finds herself staring at the body of a brewery worker and in danger of asphyxiation. With the discovery of financial discrepancies, family secrets and the lure of national success for Ruth, motives for murder and abduction abound. Sometimes a threat comes from the most unexpected quarter, and it's up to Kate to fathom the mystery.

Winter, 1920. Amateur sleuth Lady Eleanor Swift is feeling festive. She is playing host to the entire village at Henley Hall. She’s also purchased perfect presents for each of her household - not forgetting the biggest bone in the butcher’s shop for her partner in crime, Gladstone the bulldog - and is looking forward to celebrating her first English country Christmas. As snowflakes fall, Eleanor is cheering on contestants in the traditional Christmas fun run in the grounds of the hall. But tragedy strikes when one of the runners drops dead at the finish line.

Posie Parker once failed a client. And now that client is dead. Elsie Moncreiff, a housekeeper, has fallen from the White Cliffs of England in a howling storm. But the question is, was it bad luck, or was it murder?Armed with just her guilty conscience and a less-than-helpful Sergeant Rainbird for company, Posie vows to get to the bottom of things. But what she finds is not at all what she was expecting.

Kate’s retirement in Cornwall hasn’t quite gone as planned - Lavender Cottage is in need of substantial repairs, and her sister Angie’s fondness for gin does rather stretch the purse strings. So when Kate is asked to do some nursing at the luxury retirement flats in Seaview Grange, she jumps at the chance. The old Victorian house has stunning views of the sea, and the retirees are a peaceful bunch. That is, until Edina Martinelli, a glamorous ex-opera singer, is found poisoned in her home.

Posie Parker has been called to her most baffling case yet. Amyas Lyle, London’s top young lawyer, has been found with his head in a box of poisoned saltwater. It’s the perfect murder. But who hated him enough to do such a thing? Following a trail of strange notes, all of which speak of the sea and saltwater, Posie travels from London to the seaside resort of Whitley Bay, looking for answers. But nothing can prepare her for what she finds there.

August 1911. Emily Hardcastle and her inimitable lady’s maid Florence Armstrong are enjoying a fine summer until Harry, Lady H’s brother, turns up out of the blue with a mystery for them to solve. A routine parachute test at a local aeroplane factory has gone horribly wrong - with pilot Dickie Dupree plummeting to his death. Harry is certain there is more to this ‘tragic accident’ than meets the eye, having discovered that someone at the airfield is leaking top secret intelligence to foreign rivals.