This interactive sunburst chart visualizes the hierarchical structure of the Bible, with sections for the Old and New Testaments and their subdivisions. The visualization uses D3.js v5 with the `d3.stratify`, `d3.partition`, and `d3.arc` APIs to compute and render the radial layout as SVG paths. Users can click on any slice to zoom into that level, and toggle between linear and grouped node-size modes via radio buttons. The example animates transitions using `transition.attrTween` with tweened arc paths and text labels, which are positioned along the centroid of each slice. Data is loaded from a JSON file describing the book hierarchy.