Oh well, that’s guaranteed to be accurate information, isn’t it?
Never mind the title, it’s a “book”, so it must be right? 
This is totally wrong. Trades that can take hours have nothing at all to do with scalping.
This is honestly just nonsense, - sorry! “Swing trading” has no connection to timeframes at all (see “The Master Swing Trader” by Alan Farley, page 1, or page 1 of any other proper, established textbook: they all start by explaining this common misunderstanding. There’s intraday swing trading, too. It’s just not about timeframes/speed!
Sorry, but honestly what you’ve read is all just plain wrong. 