Consciousness: An Introduction by Susan Blackmore is exactly what you're looking for. Make sure you get the latest edition.

https://www.amazon.com/Consciousness-Emily-Troscianko-Susan-...

She has another book called Conversations on Consciousness that's basically transcribed interviews with prominent figures that's also worth checking out.

https://www.goodreads.com/book/show/254499.Conversations_on_...