These are two that I found of value in when first learning about Unitarian Universalism.
"A Chosen Faith: An Introduction to Unitarian Universalism" by John Buehrens - This is a wonderful introduction to UU.
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"Testimony: The Transformational Power of Unitarian Universalism" by Meg Riley - This is a great collection of stories from people whose lives have been transformed by Unitarian Universalism. It gives you an appreciation for just how powerful the UU community can be.
I don't know about Lenny Bruce, but you should see the other bits of art this guy has made:
https://parler.com/profile/Zenagogue64/posts
Totally tasteless!