These books helped me get published.

Techniques of the Selling Writer  - Dwight Swain (Recognized by most authors as a must have.)

 Self-Editing for Fiction Writers, Second Edition: How to Edit Yourself Into Print Renni Browne and Dave King (This is one I like to look at every time I edit a manuscript. Pure Gold.)

 Writing the Breakout Novel - Donald Maas (Along with his workbook, a great tool for writers looking for an edge.)

 The Power Of Point Of View: Make Your Story Come To Life ~ Alesia Rasely, well known for her amazing workshops and now and editor for a publishing house

 Story: Substance, Structure, Style and The Principles of Screenwriting ~ Robert Mckee, I took his workshop - a wonderful experience for any writer.

 Save The Cat! The Last Book on Screenwriting You'll Ever Need ~ Blake Snyder. Can't say enough good things about this one

Research Books ~ Regency

 Writer's Guide to Everyday Life in Regency and Victorian England from 1811-1901 Kristine Hughes- This is definitely a beginner's guide. It will give you a flavour for the period and tell you want you need to investigate in more detail. I have to say, this one really got me started.

 Life in Regency and Early Victorian Times E Beresford Chancellor - Another great general book for overview, personalities and directions to more information.

 REGENCY COMPANION (Garland Reference Library of the Humanities) Laudermilk.  A hugely helpful reference work, but hard to find and expensive. Try your local library and used bookstores. You won't be sorry you made the effort.

 The Rise of the Egalitarian Family: Aristocratic Kinship and Domestic Relations in Eighteenth-Century England (Studies in social discontinuity) ~ Trumbach Another very useful overview, hard to find but also worth it.

 British Aristocracy  ~ Mark Bence-Jones  A must read.

The Age of Wonder: How the Romantic Generation Discovered the Beauty and Terror of Science  By Richard Holmes. A brand new book with all kinds of gems from the Regency

Vienna, 1814: How the Conquerors of Napoleon Made Love, War, and Peace at the Congress of Vienna ~ David King. ~  Wickedly Interesting

Old Favorites Not how we should write now, but for flavour of the time, still very relevant.

Pride and Prejudice  - Jane Austen (No Regency author could not put this one on her list)

These Old Shades  - Georgette Heyer (One of my all time favorites I have to say where the heroine dresses as a boy.)

Faro's Daughter - Georgette Heyer (I love this heroine, she gives the hero such a run for her money.)

Newer works I recommend if you want to see what is selling (apart from mine of course)

 The Spymaster's Lady (The Spymaster Series) - Joanna Bourne.  This book provides a wonderful example of deep point of view.

 To Seduce A Sinner (The Legend of the Four Soldiers) ~ Elizabeth Hoyt. I am really enjoying this series.

 Warrior's Lady (Stones of Destiny, Book 3) ~ Gerri Russell

 The Iron Duke (A Novel of the Iron Seas) ~~Meljean Brook  The point of view and world building is extraordinarily well done