I didn't research where to start with your books but I picked up Prince of Thorns and enjoyed it, sad that the rest of the trilogy is not available on Kindle in my "area" though. Where would you suggest people start with your books?
The Book That Held her Heart. What an emotional ride! I'm waiting for Missing Pages to arrive and then I'll dig my teeth into that. Clearly, your next book can't come fast enough!
Grey Sister. Which reminds me I need to finish the trilogy. I bought book 2 of the Library trilogy because book 1 was one of my favourite reads of the past few years, but am waiting for part 3 to come to a local bookshop (it takes them forever!)
Currently reading The Book that Held Her Heart. The library trilogy is literally my favorite and I love piecing together the history of the library and the world.