有很多事情可以让读者参与其中，同时也可以让读者对道德和勇气的问题有一个合理的了解。《爱尔兰时报》
苏珊•柯林斯的粉丝们，见见你的新必读的作家。——爱阅读的四个孩子
西夫•西格马尔斯多蒂做了一份出色的工作，讲述了一场世界的故事，讲述了一个年轻女性的核心人物和一个现代的场景。(书包)
我是叛徒，一直是令人兴奋和惊奇的，除了外星人入侵的概念外，它完全是独一无二的，而且有一群非常迷人的角色，从十几岁的少年到卖国贼。(舞台评论页)
西夫很快成为了我要关注的作者。我不能把我的叛徒说出来。(书龙的巢穴)
西夫绝对有一份对现实世界建设的天赋，我绝对期待她能想到的任何东西。(把博客页)
我是叛徒，从第一页开始。我不能把它放下。(我的安克雷尔博客)
西格马尔斯多蒂在平衡个人冲突与大局方面做得很好。它也很有趣，也很有爱心，在黑暗中也有光明。(乔纳森•海特•西菲特杂志)
这本书是一本很棒的读物，它巧妙地将青少年的爱情故事巧妙地融入了一个快节奏的冒险故事中，一个现代的少女从她的深度中走出来，但仍在尽力拯救她的世界。(犯罪审查)
There is much to keep a reader engaged, while also raising questions about morality and courage with a reasonably light touch. (The Irish Times)
Suzanne Collins fans, meet your new must-read author. (Lovereading4kids)
Sif Sigmarsdottir has done a sterling job of spinning a War of the Worlds tale recast with a young and female central character and a modern setting. (The Bookbag)
I Am Traitor was consistently exciting and surprising, beyond the alien invasion concept it was wholly unique and with a very fascinating cast of characters, from kick-ass teens to traitors. (Page to Stage Reviews)
[Sif] quickly became an author whom I’m going to keep my eyes out for... I couldn’t put I am Traitor down at all. (Lair of a Book Dragon)
[Sif] definitely has a gift for realistic world-building, and I definitely look forward to whatever she may come up with. (Turn That Page blog)
I Am Traitor was gripping from the very first page... I couldn’t put it down. (Be My Anchorr Blog)
Sigmarsdottir does an excellent job of balancing the personal conflicts with the big picture... it’s funny and sweet-hearted too, and there’s light in the darkness (Jonathan Hatfull SciFiNow Magazine)
The book is a great read, weaving a teenage love story deftly into a fast-paced adventure story, with a modern teenager out of her depth but still doing her best to try to save her world. (Crime Review)
Sigmarsdottir does an excellent job of balancing the personal conflicts with the horror of the big picture. It’s funny and sweethearted too, and there’s light in the darkness. (SciFi Now)