The Creepers and the Code - Louisa Glancy

Tyler and Wes are the worst of friends, but the school break and an unexpected situation forces them together. Upon trying to visit Ms Clay to interview her about being a scientist, the pair find her missing and get wrapped up in a mystery. Where did Ms Clay go? Who are the strange people watching them? And why is there a page of code in Ms Clay''s house? The two decide to work together, but will they figure it out?