Changes in version 1.2.2 o new chapters: "Beyond this book", "Experimental design", "Deep learning" o "Further reading" sections in chapters throughout book o contribution guidelines o revised content and editing in numerous chapters o improved cross-referencing between chapters o updated references Changes in version 1.2.1 o revision of 'scran' & 'scater' to 'scrapper' Changes in version 1.2.0 o Bioconductor release v3.23 Changes in version 1.1.8 o move 'CCPlotR' & 'Statial' to 'Suggests:', and condition usage on availability o simplify Python setup to one virtual env setup in bkg-py-interop, omitting 'squidpy' and 'zellkonverter' in favor of 'anndataR' o various seq-visium-hd-seg fixes per 'VisiumIO' updates o updated Mitchel et al. ref. and added par. on 'cellAdmix'; added par. on and ref. to 'SPLIT' method (spatial bleeding) o 'SpaceTrooper' fix: renaming "CountArea" to "SignalDensity" o fixed RCDT/RCTD typos throught the book Changes in version 1.1.0 o Bioconductor release 3.23 Changes in version 0.99.0 (2025-06-30) o initial submission to Bioconductor