The author frames the tale as a deliberate exercise in historical fiction: carefully researched imagination, he argues, can supply motive and colour where chronicles are brief and use analogical hypothesis to resolve obscurities. He chooses 1467–the twilight between feudalism and Tudor order amid the Wars of the Roses—to stage a drama of social change, scientific curiosity, and factional violence.

At its centre are two intertwined strands: high political manoeuvre among Yorkist and Lancastrian magnates, and the private lives of morally significant but lesser-ranked figures. Adam Warner, an ageing mathematician‑inventor, has long laboured on a mechanical engine, the “Eureka.” His withdrawn devotion to mechanism and learning exposes him and his daughter Sibyll to popular suspicion and clerical jealousy—most notably from the mountebank Friar Bungey. Sibyll, once at court, is cultivated, modest and the object of competing affections: William Lord Hastings’ uneasy passion, the honest love of the tradesman Nicholas Alwyn, and the incidental involvement of Marmaduke Nevile, a gentle-born archer newly at court.

Public events press upon these private lives. Marmaduke’s early success at archery and his sheltering in Warner’s household lead to encounters that bind the personal to the political: a courtly intrusion finds Anne Neville in Sibyll’s chamber, precipitating Anne’s flight and a chain of reprisals. Adam’s Eureka is brought into the royal precincts and its spectacular explosion arouses fear; Gloucester orders its suppression while Hastings secures partial protection for Warner under the Duchess. Popular superstition and clerical imposture inflame crowds; Adam’s house is attacked, servants slain, the model stolen, and Adam and Sibyll are abducted and later entangled in campaign and captivity.

Concurrently, the great feudal axis—Warwick the “king‑maker,” Montagu and the Nevilles—clashes with Edward IV and the rising Woodville faction, whose foreign alignments (notably with Burgundy) and courtly re-grants threaten baronial independence. Northern unrest, organized by Robin of Redesdale and captains like Hilyard, erupts; Warwick’s sudden personal intervention in the rebel camp dissolves popular authority, secures amnesty promises, but leaves his honour smarting. Edward’s fickle favour, Clarence’s vacillation and dynastic plotting (Isabel, Anne, and the Nevilles) compound mistrust.

Wounded pride drives Warwick into a fateful rapprochement with Margaret and Louis XI at Amboise, where he binds himself to restore Henry VI and arrange Anne’s betrothal to the Lancastrian prince. The rupture between king‑maker and king thus becomes war: tactical defections, fog-shrouded fields, and the climactic clash at Barnet extinguish Warwick and Montagu and leave England convulsed. Throughout, the narrative insists on how private passions, scientific labour and popular superstition aggregate into national upheaval—honour and ambition producing both political realignment and intimate tragedy. The work balances military narrative with humane episodes, interrogating the moral cost of statecraft as feudal order yields to emergent modern forces.