Dolly, a book typeface with flourishes.

The family consist of four fonts:

Dolly Roman is neutral and useful for long texts. It has old-style figures.

Dolly Italic is narrower and lighter in colour than the Roman, and so it can be used to emphasize words within Roman text.

Dolly Bold is also useful in emphasizing words within Roman text. It also works well as a display type.

Dolly Small Caps is intended for setting whole words or strings of characters; while Roman capitals are used only for the first letter in a word. They match the Roman in weight and have figures that line up with the x-height.

With its relatively low contrast Dolly is perfectly legible in really small sizes. When Dolly is applied in bigger sizes of course (book covers), more crispy details will show up which are not visible in small sizes. These four fonts provide a good basis for most of the problems of book typography.

Therefore the family doesn't consist of hundreds of fonts.