0. Frye, Fearful Symmetry or The Great Code or any essays on Blake

1.songs of innocence/experience

2. the marriage of heaven and hell

3.milton

4.prophetic works

Songs of Innocence/Experience are very deep poems and can each be read on several levels. These may be read again and again. Simple diddies are pretty intense, if the poem seems trite you have not cracked it.