A series of books based on AD&D that began life as the trilogy known as the Dragonlance Chronicles by Margaret Weis and Tracy Hickman and eventually mushroomed into a vast series authored by dozens of different writers. The books are usually grouped into trilogies (such as the Dragonlance Chronicles, Legends, Tales, etc.) I tried faithfully to keep up collecting and reading the series, but had to give up when my collection reached about 40 books, and it seemed as if 5 more were coming out each month. :P