This guide is written for a general, non-technical audience. It attempts to educate the reader in the common types of malware and cyber attacks that are now seen globally. The scope of the threats vary. Some are the equivalent of graffiti on billboards. Breakins to computers just for the heck of it. Hooliganism, as the book calls it.
But there are more serious attacks. Phishing-style, for example. Where financial fraud is being tried on an unwary user. No adequate technical answer is given to this by the book.
Further along the scale of severity is cyber terrorism, or even cyber war. These are disguished by the former being done by groups unaffiliated with any government. While the latter is, or might be, performed by one government on another. Thus far, few real and damaging examples of cyber terrorism have surfaced. Nuisance value events that might be construed as cyber terrorism have occasionally surfaced in recent years. But nothing more dire.