Summa - Medieval genre of handbook, summing up a field of knowledge

"Summa and its diminutive summula was a medieval didactics literary genre written in Latin, born during the 12th century, and popularized in 13th century Europe. In its simplest sense, they might be considered texts that 'sum up' knowledge in a field, such as the compendiums of theology, philosophy and canon law. Their function during the Middle ages was largely as manuals or handbooks of necessary knowledge used by individuals who would not advance their studies any further. - Wikipedia"