This sourcebook presents an edited version of the fieldnotes gathered during an extensive linguistic survey of the Tomini-Tolitoli languages, a group of eleven languages spoken in northern Central Sulawesi, Indonesia. The introductory sections present general information about the Tomini-Tolitoli languages and about the survey, including detailed maps and a few notes on phonology and morphology. The main part of the book consists of extensive word lists of each language (between 700 and 1,400 entries per language, often including information on dialect variation).