Mark Millar 
MPH [EPUB ebook] 

Growing up in Detroit, Roscoe and his friends know all about hard luck. But their fates take a different turn when they stumble upon a street drug called MPH — little pills that give them the power of super speed, and the opportunity of a lifetime. But zooming through their riches has its downsides. When time is your only asset, what happens when the clock runs out? Collects MPH #1-4