"Big Changes at Trinity High" is the fourth novel in the Trinity High series.

Trinity High School is undergoing changes that are both challenging and heartbreaking. Naa Atswei, now a form three girl, no longer has to worry about the seniors - she is now one of them. What she and her mates do not know, is that in a strange twist of late, they now have to worry about the juniors! These new ninos are not only atypical, but are united with one resolve - wage war on all seniors!