Graham Lee is an experienced programmer and writer. He has written books including Professional Cocoa Application Security, Test-Driven iOS Development, APPropriate Behaviour and APPosite Concerns. He is a developer who's been programming for long enough to want to start telling other people about the mistakes he's made, in the hope that they'll avoid repeating them. In his case, this means having worked for about 12 years as a professional. His first programming experience can hardly be called professional at all: as it was in BASIC, on a Dragon 32 microcomputer.