I love Apple and their iBooks reader, but sometimes, it is good to have a version other than iBooks to read on a non Apple device, therefore, I converted both The Swift Programming Language and Using Swift with Cocoa and Objective-C into PDFs. Click on the corresponding covers to download the pdf book desired. Apologies in advance but due to the conversion, formatting gets a bit funky, but it is all there.
*NEW* Apple updated the Swift Programming Language manual to reflect the changes on Beta3. Here is the link to download the updated PDF and its release notes directly from Apple, [Click here to download from Apple] (the PDF link is on the top right of the page).
The Swift Programming Language below is the one Apple first release when they announced Swift. Using Swift with Cocoa and Objective-C was not modified for Beta3.