Mystical Experiences in Chassidic Tradition

[EshetChayil]

If I wanted to learn about the personal mystical experiences of the Chassidic masters, the Baal Shem Tov, Rebbe Nachman, etc. where would I go? Are there any books you'd recommend?

I'm familiar with Rebbe Nachman and his Likutey Moharan, but I guess what I'm looking for is either a biographical or autobiographical work, anything that records these Jewish mystical experiences.

 

[Tumah]

Three off hand:
אמרי קודש - קאמארנא
דברי חלומות - ר' צדוק
And this famous letter.

 

[EshetChayil]

Thank you for this. Anything in English, perchance? While I can read Hebrew, my comprehension level is low.

 

[Tumah]

Thank you for this. Anything in English, perchance? While I can read Hebrew, my comprehension level is low.

I don't think you're going to find many English book recommendations in a sub-DIR devoted to people who don't primarily read English books.
I did find the letter translated with some helpful background commentary, for you.