Gregory of Tours' history is a dense work, full of numerous narratives and characters. Gregory's history contains Christian tales of miracles, descriptions of omens and natural events, stories of Christian martyrs, dialogues of church debates, lives of holy men, lives of the nobility, lives of eccentric peasants, frequent Bible verses and references, and complex international relations between numerous tribes and nations including the Lombards, Visigoths, Ostrogoths and Huns, not to mention Gregory's personal biography and interpretation of events.
Book I begins with the a pronouncement by the author, the Bishop of Tours, of Gregory's faith. That he is a Frankish Catholic clergyman who follows the Nicene Creed, and abhors heresy like those of the “wicked” Arian sect among other heresies. The Narrative history begins with a brief epitome of the Biblical Old Testament and New Testament, and the subsequent spread of the Christian Religion into Gaul. Next Gregory covers the history of Christianity in Gaul and some of the major events in Roman-Gallo relations. Book One ends with the death of Saint Martin of Tours in AD 397.
Book 2, AD 397-511, covers the beginnings of the Merovingian dynasty. Book Two ends with the death of King Clovis in 511, after his conquest of large tracts of land in modern-day France. Also narrated is Clovis's conversion to Christianity by his wife Clotilde.
Book 3, AD 511-548, follows the four male inheritors of King Clovis who equally divide his realms at his death in AD 511. These four kings, Theodoric I, Lothar I, Childebert, and Chlodomer, quarrel and fight for supremacy of the Frankish realm. Despite their disputes, the four brothers can occasionally work together against an outside threat, such as successful cooperation against the Burgundians in 523. Eventually Clothar becomes the most powerful King in the Frankish realm. Book Three ends with the death of king Theudebert I in 548. He is a grandson of Clovis and son to king Theodoric I, who died in 534 bequesting his kingdom to Theudebert. The kingdom after 548 falls to Theudobald I until 555.
Book 4, AD 548-575. The two remaining sons of Clovis die; King Childebert in 558 and King Clothar in 561. The last years of his life see the entire realm of the Franks ruled by Clothar. At the time of his demise in AD 561 (like Clovis before him), the Kingdom is divided equally between four sons of Clothar and again the kingly sons quarrel for control of the entire Kingdom. A truce between the brothers is maintained until after the death of King Charibert I (son of Clothar) in 567. Clothar's remaining sons, Kings Sigibert, Guntram, and Chilperic, fight for the supremacy of the kingdom, with King Sigibert showing the strongest military force. Book Four ends with the killing of King Sigbert in AD 575. Gregory of Tours blames Fredegund, the wife of King Chilperic, for this assassination. The death leaves King Chilperic as the dominant king. Fredegund has long held a grudge against King Sigibert and his wife Brunhilda.
Book 5, AD 575-581. This book begins the part of the narrative where the author (Bishop Gregory of Tours) has much personal knowledge about the events in the Frankish Kingdom. This book and the ones hereafter, are considerably longer and more detailed than previous, whilst covering a smaller amount of time. This book also contains Gregory's impressions of ecclesiastical issues he saw in person and had some bearing on. This book describes a possible debate that Gregory had with a rival Arian church leader. Book 5 also introduces Childebert II, the son of recently slain King Sigibert, and of the still living Brunhilda. Childebert is taken along with Brunhilda under the protection of King Gunthram, brother and sometime rival of King Chilperic.
Book 6, AD 581-584. The young Childebert betrays his alliance with his adoptive uncle King Gunthram, the king who had protected Childebert and his mother after his father Sigibert's death. Now Childebert forms an alliance with his uncle, King Chilperic, who had often been an enemy of King Sigibert. Later, King Chilperic is murdered under mysterious circumstances in AD 584.
Book 7, AD 584. Fredegund assumes regency for her young son Clothar II. In the future Clothar will be king of all Franks until his death in 619, but that is beyond Gregory's narrative which end in roughly AD 593. Fredegund and her son are under the protection of King Gunthram. She remains in power until her death in AD 597. Also in this book is the rebellion of Gundovald and its failure. Gundovald claimed to be a lost illegitimate son of dead King Chlothar I. Many of the Frankish nobles and the Byzantine emperor Maurice gave some support to this rebellion; however, it is swiftly crushed by King Guntram.
Book 8, AD 585.
Book 9, AD 586-587. The Treaty of Andelot is signed in AD 587 between King Guntram, Brunhilda, and King Childebert II. The treaty is a close pact of alliance, wherein Childebert is formally adopted as Guntram’s heir. Brunhilda also formally allies with Guntram and comes under his protection.
Book 10, AD 587-591. Around 589, Basina the daughter of King Chilperic I and Clotilda, daughter of King Charibert lead a brief revolt from a nunnery. The 18 Bishops of Tours are named and described. Book Ten ends with a summary of Gregory's previous written works.
The Historia Francorum is made up of ten books. Books I to IV initially recount the world's history from the Creation (as was traditional); but move quickly on to the Christianization of Gaul, the life and times of Saint Martin of Tours, the conversion of the Franks and the conquest of Gaul under Clovis, and the more detailed history of the Frankish kings down to the death of Sigebert I in 575. At this date Gregory had been bishop of Tours for two years.