You can find the readings for the year on the Lectionary page of the Episcopal Church USA.

This page explains the calendar and seasons of the church year.

You can find the current Book of Common Prayer (BCP) here. There’s even a Book of Common Prayer app for iOS and Android! (Check the Apple or Google Play stores.)

Historical versions (from 1789 to 1928) of the BCP can be found here, along with additional resources such as the Book of Occasional Services, Lesser Feasts and Fasts, and more.