Cohesion is a complex system of mechanisms and tactics that promote meaningful communication by decreasing ambiguity and directing readers through the logical flow of ideas. It allows writers to not only communicate their ideas clearly, but also develop a harmonic connection with readers. This research investigates cohesive devices in the context of Cassandra Clare's young adult novel "Clockwork Angel." The study divides cohesive devices into five broad categories based on the classification presented by Halliday and Hasan (2014): reference, substitution, ellipsis, conjunction, and lexical cohesion. The aim of this paper is to show how, far from being merely linguistic tools, these cohesive devices develop into conduits of knowledge, stimulating critical thought and creating connections between various concepts in the reader's mind. A total of 29430 instances of cohesive devices were discovered after a thorough analysis. There are 24956 references, 4050 conjunctions, 289 substitutions, 83 lexical cohesions, and 52 ellipses. The findings support the hypothesis that all of the aforementioned cohesive devices will be used in the novel as well as the hypothesis that reference and conjunction will be used the most. The data was gathered and shown by chapters because it provides a framework through which to investigate the complexities of storytelling. Readers obtain insight into the novel's structural organisation, character and story development, and thematic evolution by analysing how these devices are used in different chapters.