I have linked some specific lessons and books below but this link has all of Neville’s lectures online: http://www.realneville.com/text_archive_pdf.htm
I’d personally recommend buying the complete collection of Neville’s book but there are also pdf copies of individual books available online.
Often, the Power of Awareness and Feeling Is the Secret are the books that start the journey into understanding conscious creation.
Lesson 1: CONSCIOUSNESS IS THE ONLY REALITY
Lesson 2: ASSUMPTIONS HARDEN INTO FACT
Lesson 3: THINKING FOURTH-DIMENSIONALLY
Lesson 4: NO ONE TO CHANGE BUT SELF
Lesson 5: REMAIN FAITHFUL TO YOUR IDEA