Tear gas (Olfactory Imagery, p. 220)
When Callum's house is tear-gassed, Blackman writes: “The strong smell of garlic caught the back of my throat and brought instant tears to my eyes. I coughed and coughed.” In this example of olfactory imagery, Blackman uses the familiar smell of garlic to immerse the reader in Callum's experience with tear gas.
Rumbling crowd (Auditory Imagery, p. 48)
Sephy approaches her school on the first day and hears “a strange, rumbling sound—like someone playing a radio really loudly, but far enough away so that I couldn’t make out exactly what was being said.” The auditory imagery here builds suspense, leading to her discovery of the riot outside the school. Comparing the crowd of angry Crosses to a distant radio also foreshadows that this unknown sound is something that will be recorded and reported.
Karl's appearance (Visual iImagery, p. 70)
When Sephy's driver is fired, she unexpectedly meets Karl, her new chauffeur. Blackman writes: “He had mousy-brown hair which lay flat and lank against his head, and ice-light, ghost-like blue eyes.” In this example of visual imagery, Blackman uses both natural (mousy, ice) and unnatural (ghost-like) descriptors to describe Karl. His appearance is unsettling to Sephy, and though she doesn't do it deliberately, the details Sephy notices draw attention to the visible markers that make him a nought: pale, flat hair and blue eyes. His skin color isn't explicitly mentioned, but Sephy comments on the lightness of his attributes.
Callum's breath (Haptic Imagery, p. 13)
Sephy enjoys her first kiss with Callum, despite being reluctant at first: “Callum’s breath mingled with mine and felt warm and sweet.” The haptic imagery here mixes with the sense of taste, since things can't feel sweet. The imagery emphasizes their intimacy, as well as the warmth and pleasantness of the kiss.