Look for "baba ramdev + pranayam". There are a ton of videos online with him teaching pranayam. Like with all things of this nature there's a whole lot of junk surrounding it (marketing etc) that he also indulges in but the exercises themselves are good. Here's what I could find.

You might find some books at patanjali[1]. They have a good list of exercises although the BS part does appear in some books.

[1] https://patanjaliayurved.org/product-category/patanjali-publ...