<p>Some Houston residents are upset after Korans were left on the doorsteps of hundreds of homes in their neighborhood as part of a campaign to educate people about Islam.</p>
<p>Residents of Braes Timbers in southwest Houston began finding the holy books two weeks ago, MyFOXHouston.com reported. The Korans came with a note saying they had been left by the Book of Signs Foundation, which claims to have distributed 30,000 free copies of the texts to residents throughout the city.</p>