I found 2 academic reviews on ProQuest.

Laina Farhat-Holzman, author of one of the reviews on ProQuest largely buys into Fernandez's view, and praises the work as readable, well documented and somewhat cheeky: "For me, the fun of reading this book is that each chapter begins with quotations from the most famous scholars of Islam, professors from some of our most famous universities, who provide a Panglossian picture of this Andalusian Paradise. Fernandez-Morera quotes them at length, and then proceeds to provide reality backed by impressive documentation." but I'd question her expertise on the matter, since in that same review she claims that all of Spain except for "the Basque north" was conquered.

Julia Pavón Benito, form the University of Navarra also praises the book, branding it as a much needed and legitimate revision of a perpetuated falsehood.

I haven't read the book, but from the reviews it sounds like the author presents a nuanced view of the conquest, while highlighting misinterpretations that have been perpetuated. If that is really the case, then I'd even question the revisionist nature (not necessarily a bad term) of the work, since that stance has been commonly held in mainstream Spanish-speaking scholarship for quite some time.

Finally, the author has good personal credentials: Harvard PhD and Northwestern University professor, so I'd go ahead and read it if I were you.