What a fantastic little guide this book is. I must mention the art first - it is colorful eye-catching and very evocative of the setting. I can see many of the pictures providing great inspiration for tokens for Roll20 and the like.
The actual book itself is great. It is designed to complement Skirmisher's Swords of Kos setting but can also be used as a standalone product. I can see players of 5e Dark Sun and Al Qadim games finding many uses from the monsters, encounters and table herein.
There is a great overview of the area, including a map, to give you an idea of how the region feels to adventurebe in. The new creatures themselves are wonderfully detailed - the stat blocks are very clear and stand out well from the text (in fact the layout of the whole product is well thought out altogether).
I think my favourite part is the Aigyption Background. There are some great Bonds, Traits, Flaws and Ideals that work really well for this and other games. I don't want to give everything away so I'll leave it there but if you've bought any Skirmisher products you know the high level of quality you'll be getting with this one too for a great price.