Coming June 29, 2027

The Lady's Guide toCalculated Ruin

A Regency heroine who runs a discreet problem-solving salon, a rake with inconvenient intelligence, and a contract every woman in the ton wishes she had written first.

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The Lady's Guide to Calculated Ruin by Catherine Kerrigan: a novel of mathematics, mischief, and a very inconvenient rake

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Theodora Thornbury runs a discreet problem-solving salon from the back parlor of her Mayfair townhouse. Her clients are ladies—and the occasional desperate gentleman—who require solutions that polite society cannot publicly acknowledge. She is methodical, private, and has spent a considerable number of years constructing a life that requires very little from anyone else.

When Robert Ashford, Earl of Briarcliffe, arrives with a problem he describes only as inconvenient, Theodora recognizes it immediately as the kind that ruins people. Solving it will require everything she has carefully hidden about herself, and the cooperation of a man whose intelligence is, most unfortunately, equal to her own.

The world of the book

Regency London, with sharp edges

Private salons, contested wills, and women who know exactly what they are worth.

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First Chapter Excerpt

Chapter One

The appointment card said half past two. It was now a quarter to three, which Theodora Thornbury noted without displeasure—she had learned to distinguish between the lateness of a man who wished to establish advantage and the lateness of a man who was genuinely uncertain whether to come at all. The Earl of Briarcliffe, from what little she had been able to determine in the forty-eight hours since his card arrived, was probably the second kind.

She was reviewing her ledger when Mossop showed him in. She did not close the book.

He managed her name with deliberate understatement. “Miss Thornbury.” Not the Miss Thornbury, not the theatrical pause that some of her clients could not resist. Simply her name, plainly spoken, as though he were not standing in a room most of his acquaintance would have found difficult to explain.

“Lord Briarcliffe.” She gestured to the chair. “You have the inconvenient kind, I take it.”

He settled himself with the unhurried ease of a man accustomed to rooms arranging themselves around him. “I beg your pardon?”

“Of problem,” she said. “There are two kinds. The kind a person knows they have, and the kind a person suspects they have but cannot yet prove. You have been sitting in that chair for thirty seconds and you have already looked at my ledger, the card index, and the mechanism on the corner of my desk. You are trying to determine whether I am competent. That suggests you already know the answer will matter.”

The Earl of Briarcliffe looked at her for a moment with something she might have called respect, if she had been less careful with her assessments. “You have better arithmetic than reputation,” he said.

“My reputation is managed by other people.” She opened her ledger to a fresh page, uncapped her pen, and wrote the date at the top in her small, even hand. “I have a policy about rakes, Lord Briarcliffe. Not a prohibition—I am not sentimental about categories—but a caution. The kind of trouble that follows a man of your particular history tends to require a great deal of ancillary work that does not appear in the original estimate.” She looked up. “Tell me about the letters.”

He told her. It took the better part of twenty minutes. She did not interrupt. When he finished, she set down her pen, regarded what she had written, and allowed herself one moment to consider whether she wished to be sensible. She wrote his name at the top of the page. She had a column in this ledger that she kept for complications. She wrote it there instead.

Continue reading when the book publishes June 29, 2027.

Questions

Before you begin

When is it out?

June 29, 2027.

Is it part of a series?

Yes. It is Book One of The Thornbury Files; the second Theodora Thornbury novel is in progress.

Can I read it early?

ARC readers receive a finished copy before publication day, in exchange for an honest review.