Hollywood’s on a real purchase spree this week, with several stories over the past few days telling of big buys and small buys on spec scripts, and even a pre-existing property. Let’s get down to it.

First up, Deadline has learned that Warner Bros. will collaborate with popular Twitter user Kelly Oxford on her first feature, Son of a Bitch. Said to be reminiscent of Bridesmaids, the film will revolve around “a young stoner who tries to maintain her popular party image even after discovering she’s pregnant”; Steve Golin and Kerry Kohansky-Roberts are producing. If her amusing tweets are any indication — a six-figure deal has me thinking that’s the case — something witty may be on the way.

Next up, Deadline also reports that Palomar Pictures have bit into the juicy apple of young adult fiction, picking up Julie Kagawa‘s Blood of Eden. The first book, The Immortal Rules — which was published just yesterday — pits the action in a futuristic world low on humans and high on vampires. Living in an outer area cleverly named The Fringe, Allison Sekemoto is soon attacked by the bloodsucking creatures, forced to choose between a lifestyle of safety or a dangerous-but-independent existence. We could count off the cliches with our eyes closed, but initial reviews of the book make it sound a little more promising than most of Hollywood’s other efforts in this vein.

Moving into some script acquisitions, Variety informs us that Warner Bros. have bought Law Zero, a secretive, futuristic actioner pitch slated to be written and directed by Bruno Zacarias and Miguel “Macgregor” de Olaso, who want me to dislike them off the bat by crediting themselves as Zac&Mac. Roy Lee (How to Train Your Dragon, The Woman in Black) will produce for the studio.

We’ve heard from, again, Deadline, that 20th Century Fox and Davis Entertainment will be tackling Cardiac. From writer Lars Jacobson, the film — described as something of a mix between Taken and Safe House — revolves around a father forced to hunt down criminals who steal a heart that his daughter needs for surgery. That could be fun, that could be stupid, hopefully it’ll be both.

The most minor (and final) item would come from Deadline, who report that Sony picked up something entitled Savage Planet, which was bought on spec from writer Cole Haddon. Matt Tolmach, Avi Arad, and Alex Goldstone & Bard Dorros of Anonymous Content will produce. The rest is not for our eyes.

Are you up for any of these projects, or is it too early to make a solid decision?