Less than a year after launching its Shopping Express service in Silicon Valley and San Francisco–delivering retail products straight to homes on the same day they’re ordered online–Google is muscling even farther into Amazon’s territory, offering overnight delivery across Northern California. The search-giant-turned-internet-retailer announced the move on Tuesday. As with its same-day delivery service, which recently expanded to include parts of Los Angeles and New York, Google isn’t building Amazon-style warehouses to fill with its own inventory. Instead, orders will be filled by chain stores such as Target, Walgreens, Staples, and Whole Foods. When Google started offering same-day delivery to the public last September, it felt more like a curiosity: With all its algorithmic, artificially intelligent might, what could Google possibly pull off in the physical world?