The full text of the draft withdrawal agreement, all 585 pages of it, is available to read online. You can find it here.
In addition, the UK government has produced a rather lengthy ‘explainer’ document, outlining its interpretation of the agreement. You can find that here.
Update on November 20th 2018: The government has now produced a more condensed explainer, in the form of some ‘explanatory slides’, which are available here.