Latest free vampire reads? That's a tough one because 'free' can mean a few different things, and 'latest' depends on how you define it. Traditional publishers almost never give away brand-new releases for free unless it's a temporary promotion, usually tied to a newsletter sign-up or an Amazon Kindle Deal of the day. You'd have to be really vigilant on sites like BookBub or the author's own social media to catch those fleeting windows.
My actual recommendation for consistent, recent content would be serialized fiction platforms. Sites like Royal Road or Scribble Hub are packed with ongoing vampire stories being written chapter-by-chapter. The quality varies wildly, but the sheer volume means new chapters drop daily. I'm following one called 'Crimson Covenant' that updates twice a week; the author is building a fascinating undead aristocracy. It's not a polished, edited novel, but it's fresh and directly from the creator's mind.
For a more curated, 'book-like' experience, don't sleep on Kindle Unlimited's free trial. It's not technically 'sites offering free books,' but a subscription model that unlocks a massive library. A ton of indie vampire romance and paranormal fantasy hits KU the same day they're published. With a trial month, you can binge a dozen new releases legally. Otherwise, checking out author websites for free first-in-series hooks is a classic move—they're bait, but it's often good bait.