Shadows of the night

When everyone around her starts dying and a mysterious young detective working the case, Siera struggles to understand the unexplainable with her time quickly running out..... I'd greatly appreciate any feedback people can give me, i've never written a novel before. I also tend to post the chapters before much editing, so I know they need to be (mainly because i'm crap at grammar and english rules, so i'm learning from your comments as i go!!). I'd really like any comments on the flow of the chapter, content, anything that stands out etc....All feedback is welcome!!

• Chapter 1 - First Kill (revised-again)"I've re-re-re-edited this a..."
• Chapter 2 - The Crime Scene"I have edited this section ..."
• Chapter 3 - The morning after " When everyone around her..."
• Chapter 4 - Second death"The vampiric killer strikes..."
• Chapter 5 - Confirmation " When everyone around her..."
• Chapter 6 - The Lie"A rough copy of this chapte..."
• Chapter 7 - Lost Friends"Briar bumps into his long l..."