Start with Frederica. It is late Heyer, which means the comedy is at full strength, the research is worn lightly, and the romance is between two adults rather than a rake and an ingenue. Nothing in it requires you to have read anything else.
The usual recommendation is The Grand Sophy, and it is a better-plotted book. It also contains an extended scene with a moneylender written as an antisemitic caricature. The scene is well known, it is not incidental to the plot, and readers regularly stop the book there. Knowing it is coming is the difference between an unpleasant surprise and an informed decision, which is why Frederica is the safer first recommendation rather than the automatic one.
There is almost no order to follow
Heyer wrote around fifty books and the Regency romances are standalone. There is no continuing cast, no chronology, no arc. Publication order tells you something about her development and nothing about the plots, so read by reputation.
The one real exception is a four-book family sequence: These Old Shades, then Devil's Cub, then Regency Buck, then An Infamous Army. The connections are genealogical — later books feature the descendants of earlier ones, aged and occasionally ridiculous. You can read any of them alone and lose only the pleasure of recognition.
Two things to know about that sequence. These Old Shades is Georgian, not Regency: it is set in the 1750s, in a world of powder and patches, and it is the closest Heyer comes to swashbuckling. And An Infamous Army is the outlier of her whole career — the Waterloo chapters are a straight battle narrative drawn from eyewitness accounts and dispatches, and it is the book taken most seriously as history. It is also the least like a romance.
The comedies
This is why people read her. The Grand Sophy, Arabella, Cotillion and The Unknown Ajax are the farces: mistaken assumptions, impostures, appalling relatives, and dialogue built out of period slang she reconstructed from her own notebooks. Cotillion in particular is the one that quietly demolishes the Heyer hero — the dashing cousin is a fool and the unpromising one is not — and readers who find her formula tiresome often change their minds on it.
The more serious ones
Venetia and Sylvester, or, The Wicked Uncle are the character studies, both with genuinely adult central relationships. A Civil Contract is the one that divides her readers hardest: a marriage of convenience between a ruined aristocrat and a merchant's daughter, in which the expected romantic reversal never arrives and the book is about accommodation instead. Most readers either name it her best or find it a betrayal of what they came for.
The detective novels are a separate career
Heyer wrote a dozen contemporary detective novels alongside the romances, and Envious Casca is the best known — a country-house Christmas murder with a locked room and an unlikeable victim. They are competent Golden Age puzzles with Heyer dialogue, and by most accounts the plots were worked out with her husband while she wrote the prose.
Read them if you like the period mystery form. Do not read them expecting the Regency novels, and do not start with one: they are the smaller achievement, and they are not why she is still in print.
The biography
The Private World of Georgette Heyer is a 1984 life written with access to her letters and family papers, and it is the reason much of what is repeated about her is known at all. It is affectionate and now dated; Jennifer Kloester's later biography, not in our list, is the fuller modern account. Read either only after several novels — the appeal of the life is entirely downstream of the work.
Follow the full ordered path here: Georgette Heyer books in order: where to start with the Regency romances.
