noun
compendium
kum-PEN-dee-um/kəmˈpendiəm/
A concise collection of information on a subject.
The botanical compendium gathers compact entries on many plants.

Etymology
Literally “that which is weighed together,” compendium meant a shortening or saving. Its literary use applies that shortening to information, presenting the principal points of a larger work in compact form.
In context
bring them together into one compendium as he says in the preface the following collection of sayings by Oscar Wilde
More examples
- She compiled a compendium of local legends.
- A compact compendium summarized the field's major discoveries.
- The library acquired a compendium of botanical knowledge.
Forms
compendium · compendiums · compendia
compendious adjective — containing much information concisely