Illuminae is unlike anything that you will probably ever read. The story is completely told through journal entries, emails, online chats, medical reports, maps, interviews, other reports, and several other forms of media. I absolutely loved that the authors didn't use the traditional format and styles of writing, but instead used forms of writing, that you would never suspect to make up a whole entire book.
Illuminae has a stupendous, page-turning plot, full of twists and turns. This book never lost my attention. The character development is also amazing. I don't know how the authors were able to accomplish it by just using the forms of writing that they did, but they did. I would say that the character development in Illuminae is better, than a good amount of books (I have read) that use the traditional writing format. Some themes shown in Illuminae are romance, resilience/perseverance, selflessness, and hope. All of these themes are interwoven beautifully and executed wonderfully.
I would highly recommend Illuminae to science fiction lovers, dystopian fans, and to those who want to add variety to their reading repertoire.
If you like Illuminae, don't miss the sequel Gemina (releasing October 18th, 2016).