I give this a resounding "pretty good." I finished it a while ago, so my memory might be a little hazy. What I really loved about this one was the setting and the way Malarkey throws us deeply into place. Now, I say this as someone who has never been to Egypt, so I can't vouch for accuracy, but I can vouch for feeling like I had traveled somewhere I've never been. I might not have sand in my shoes, but especially during a pandemic, I felt this book took me somewhere -- and during a time of uncertainty, proving people can survive uncertain times. (Though some don't.)
At first the character of Gemma was a bit off-putting, until I remembered that she was grieving - things then made more sense. She is a strong character, pretty well-developed, as I recall. But that said, there are a lot of grieving people in this book. And given the time and all, that's understandable, but it gets to be too much. It's not tempered by much. I thought this book was going to be more action-adventure. I've read quite a few of those, most of them taking place in current times, and kind of ridiculous (though frequently enjoyable for a one-time go) in the way the heroes subvert danger and come through in the end. I suppose that's part of the genre. This book is far more subtle on the action-adventure part, and not in a good way. There just wasn't enough, given the subject matter. I don't want to read a character who's totally flat, but in this kind of book, I want to read more action. I don't even remember the names of the other characters two and half months after finishing it, but I do remember they felt somewhat flat, and the injured guy felt tedious inside his grief. If I wanted to read a book about grieving people, I would have picked up one about the topic. I don't feel the characters to be fully-formed; the guy missing his leg is like a boring broken record.
I do recall the scene of the riverboat ride, and to me that's where the best of the writing comes into play - more depth to the characters, more intrigue, and more scenery. Malarkey excels at place. Just the rest of it was not as I had hoped. I don't think I would necessarily recommend this book, but I wouldn't say to ignore it if it falls into your lap.
My brief vegan take on this one: besides the camel exploitation, which is gross, the worst part of this book is during the boat ride, when Gemma asks if the hen on board is going to be eaten "soon." If not, she would name the hen. I'm not going to go into the issues of setting and food and location, because I obviously know that people eat and have eaten animals for centuries. But that line was particularly troubling. Of course, it's appropriate to give a human name to an animal for your comfort until you decide it's time to kill and eat them.