The Ages
A chronological walk from the delivery room to the schoolyard, with the everything-that-holds-at-every-age woven in between the ages as interludes.
Best for reading deeply about the age in your lap right now.
version bThe Handbook
A dense field guide organized by topic across all ages: development tables, every do and don't, the collected warning signs, myths, open arguments, and the full bibliography. Filterable and printable.
Best for looking something up, or printing.
version cThe Questions
Starts from what you are actually wondering, at 3am or at the school gate, and gathers the relevant research around each question, one thing at a time.
Best when you are tired and need the shortest path to an answer.
Written from the research, cited throughout, and none of it is medical advice; the long version of that sentence is in the footer of every page.