Pretty When they Collide by Rhiannon Frater

Pretty When they Collide is a novella by Rhiannon Frater set before the events of the Pretty When She Dies trilogy.
The back cover describes the plot thus - "Cassandra is a dhampire - the offspring of a vampire and a mortal woman - and a thief of occult relics.
Aimee is a full-blooded witch that is bound to a powerful vampire who traffics in the slavery of supernatural beings.
Both are powerful, lonely and trapped in the dangerous world of vampires.
When Cassandra steals a relic from Aimee's vampire master, he targets her as his next acquisition. What he doesn't realise is that a chance encounter between Cassandra and Aimee ignited a spark between them that they cannot deny.
To survive, the women must find a way to band together and fight against the ruthless evil that conspires to enslave them forever."
Essentially, this is the story of how Aimee and Cassandra met and fell in love. It is a novella running to a mere 126 pages, but even so, it is well written, full of action and suspense and as a reader I was rooting for Aimee and Cassandra throughout. Both are very likeable characters. Rhiannon has this to say about them in the author's notes at the back of the book - "I won't lie. These two are probably my second favourite couple after Glynis and Ignatius in the Vampire Bride series. Their dynamic and chemistry is just so vibrant and real and pours off the page. Individually, they are really awesome characters, but together they are magnificent."
I haven't read her The Vampire Bride series but she has intrigued me enough that I want to buy this series. I love vampire novels and the Pretty When She Kills series was easily the best vampire trilogy I've read. So naturally, I wanted to read this spin off book and I was not disappointed. My only criticism, and it is a very minor one, is that I wish the story went on far longer. I hope Rhiannon writes more books in this series. She has said if the fans want them she will write them.
This novella costs £5.89 but I got my copy for £5.60 from Amazon. Not much of a saving, I know, but any saving is better than none. I'd rate this book as 9 out of 10. With a higher page count it would probably have got a 10 out of 10.