Books on functional programming for experienced (OO) developers?

I've done a fair share of developing software but primarily exposed only to OO languages. I've dipped my toes into FP and while I understand the benefits, I struggle when it comes to day to day application.

1. While I bring in C# option/maybe implementations and apply them. 2. I've seen (many times) the Boundaries talk by Gary Bernhardt yet struggle to apply it effectively 3. I also took a PL course (https://www.coursera.org/learn/programming-languages)

I'm looking for a good books to supplement my knowledge and also tips from folks here with a similar experience on applying FP practices with OO and how they were able to transition from knowing the theory to applying it successfully.