‘Invisible’s got an excellent, tense plot, shifting between the two main characters, with a good number of surprises along the way. Poulson always has great, strong women characters, with real lives and feelings . . .  I liked the fact that the depictions of violence and injury were realistic without being over-detailed or gloating . . . It was a pleasure to find a book that did the excitement, the jeopardy and the thrills without putting off this reader . . .  a very good read for anyone.’