Reddit reviews The First World War: A Very Short Introduction

I thought this was a phenomenal book. It isn't as brief as the name implies and gives a detailed overview of the entire war down to each major battle and who was in charge and how they were fought. I enjoyed the writing style as well.

https://www.amazon.com/First-World-War-Short-Introduction/dp/0199205590

[This] (https://www.amazon.com/First-World-War-Short-Introduction/dp/0199205590) and [This] (https://www.amazon.com/World-War-II-Introduction-Introductions/dp/019968877X) are your best bets as many professors use these in their classes.

I don't know how "basic" of an overview you're looking for. This is a decent video, that is extremely high level. https://www.youtube.com/watch?v=_XPZQ0LAlR4

I also read a very nice, and short, book: *The First World War: A Very Short Introduction

DON'T READ GUNS OF AUGUST NO NO NO. Unless you want to read about the arboreal history of the trees that were cut down to make the paper used on a telegraph sent to an obscure Prussian corporal in 1893.
Read this.
http://www.amazon.com/First-World-War-Short-Introduction/dp/0199205590