A major element of gameplay is the optional discovery and collection of manuscript pages from Alan Wake's latest novel—"Departure". Although Wake does not remember writing this book, its storyline seems to be becoming real around him. These readable manuscript pages are scattered around the game world, out of chronological order; they often describe scenes that have yet to occur and act as warning and instructions for proceeding through upcoming challenges. Other optional collectibles include coffee thermos flasks scattered around the game world (100 in all), as well as discovering television sets which show different episodes of the fictional "Night Springs" series, radios airing talk and music from Bright Falls' local radio station, and textual signs around the town. The radio shows and signs provide a deeper understanding of the town's history and culture. The game's downloadable content episodes introduce other collectibles such as alarm clocks.