There is a full PDF file of Halfway to the Grave by Jeaniene Frost here:
As the copy is PDF you can download it to your tablet, phone or eReader very easily. The book is very highly rated with 4.22 on Goodreads and tells the story of a female half-vampire.
The book also came out as a mass market paperback and can be bought for as little as 1p from amazon:
There is also an option to pay for an Ebook copy or it is also available on audiobook.
Halfway To The Grave is the first of the Nighthuntress novels/Cat and Bones series and is followed by One Foot in The Grave which can also be downloaded online and found here: