Weird that they would charge $34 for an ebook when it is also available free online though, does their formatting really add that much value? I guess may would

Weird that they would charge $34 for an ebook when it is also available free online though, does their formatting really add that much value? I guess may would pay that price without knowing it is also available free online, personally I'd rather make a donation to the author than pay O'Reilly.