Comp Titles in Amazon Sales Page?

Friends,

Does anyone know for certain if we are permitted to put comps titles on our amazon page book description?

I have four comp titles listed at the end of my description page. I would love any thoughts, feedback, or even just “yeah, I do this all the time and nothing has happened to me.”

Here is a link to my Amazon E-book page (it’s in pre-release mode).

Thanks,

Matt