Any books on Slavic mythology I could study?

I (14f) am from the Czech Republic. I want to make a book inspired by my country's wildlife and folklore/mythology. Problem is… There are so little sources for it that I know little to nothing about Slavic mythology. I am sad that I don't know the mythology of my own country. Any books anyone knows of about it? Just like, basic Slavic myths, creatures, etc? I know some, but the extent is Black Shuck, Vodník, Hejkal, and Baba Yaga.