Barry’s voice is great for spiritual books. I love it.
I must’ve listened to the whole of Complete Reader at least 10 times till now. 
If I was motivating someone with success stories, my recommended starting points would be “Freedom For All” and “The Law and The Promise”.
For consciously manifesting your reality, imagination is way less important than FAITH - as in “Your Faith is Your Fortune”…
The Assumption that what you’ve asked for (or something better) is on it’s way to you.
My real recommended starting point - for both Nevillizers and Lesterizers - would actually be their predecessor Florence Scovel Shinn’s book “The Game of Life and How To Play It”.
Cool thing is it’s public domain, and you can find it for free both as PDF and in Barry’s voice. 
First, learn to play and win with Florence’s books. All her work combined can be read in under 7 hours - and is free on youtube.
Only later should you complicate it, if you feel like it. 