Book Tour & Giveaway: Winter Dawn by Alex Callister – Genre: Thriller @CallisterAuthor @RRBookTours1 #RRBookTours #BookTwitter

Meet Winter: she’s the audacious, hyper-intelligent GCHQ agent with more notches on her bed post than James Bond and more hacking cred than Lisbeth Salander. Winter Dawn is the beginning of the Winter series, journeying back to the start of her story. This time, she’s grappling with Colosseum: a sinister online phenomenon that has gripped the world. It promises a massive cash prize to the successful hunter of its victims, unleashing an unstoppable tide of violence – and the world’s authorities are powerless to prevent it.