US coffee shop giant Starbucks Coffee Company has signed a partnership deal with US bookstore giant Borders Books to roll out at least six joint trading ventures in Australia. The plan involves incorporating a sub-leased Starbucks cafe into all of Borders' local outlets. The first combined store is due to opens in Westfield Hornsby this week. Starbucks is being incorporated into the store under a sub-lease arrangement. According to Markus Hofer, MD of Starbucks Coffee Company Australia, the co-branding concept is based on similar initiatives already apparent in the UK.