A throne of glass is moving through South African bookstores and will soon turn up at Comic Con to celebrate the arrival of globally bestselling author Sarah J Maas' latest novel, House of Flame and Shadow. The novel the third in a trilogy, all three of which are sitting in the SA top twenty right now. Maas' fame is being compared to the peak popularity of JK Rowling's Harry Potter series, and she seems to attract a similarly dedicated following.