~ Not A Musician ~

Book Soup has a few copies of Kevin Hart's second book "Marcus Makes a Movie" that include a signed bookplate.

"Signed stock is available on a first-come-first-serve basis while supplies last.
If you choose to order online, please write "signed copy" in the comments section upon checkout."

https://www.booksoup.com/book/9780593179147

Premiere Collectibles also has their own bookplated copies, but I've had too many issues with them to recommend them.