An Assembly Such as This
is the first book in a trilogy that relates the events of Jane Austen's Pride and Prejudice from the viewpoint of Mr. Darcy.
I really loved how Pamela Aidan took the existing text and fleshed things out from Darcy's perspective. The writing is definitely modern as far as structure and description go, but stylistically and factually it stays within the bounds of Austen's England. In this book Darcy finds Elizabeth every bit as difficult to read as she finds Darcy in the original novel.
The cast of characters is somewhat expanded, as Darcy does not and would not interact with a number of the people Elizabeth spends her time with. Some of the prominent characters in the original novel--Elizabeth's mother and sisters, for example--are only minor characters here, and individuals like Bingley and his sisters become much more prominent. Probably the most noticeable addition of Aidan's in this book is the character of Fletcher, Darcy's valet. He is a delightful addition to the story, and really helps to ground the setting historically.