Thanks to the Vikings show then The Last Kingdom who made me curious about this lexical field,
for those who didn’t get exactly what im looking for : the history of the English + Scandinavian area FROM The Germains TO few years after vikings fall.
I'd suggest:
Oosthuizen's The Emergence of the English
Higham's The Anglo-Saxon World
Stenton's The Anglo-Saxons (it's an older work but still holds up pretty well as a detailed 101)
Lavelle's The Danes in Wessex and Alfred's Wars
Baker, Brookes and Reynolds' Landscapes of Defence in Early Medieval Europe
Baker and Brookes' Beyond the Burghal Hidage