The dash isn't strictly necessary, the author could have used a comma or even parentheses. The dash is stronger and draws the reader's attention to the other two works better than other punctuation might. To my ear using "including" in the first one is distracting and a bit ambiguous because it forces you stop and consider exactly what the author means.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.