Protecting it All question

I have been trying to find this book. I have tried links from here as well as the author's page. They seem to be dead. This is the 4th in Livia Grant's Passion series. I have read the first three. I can find the 5th, but I would like to read them in order.
Any help would be appreciated. I am not looking for a free book, but want to buy this e book.