What books do you recommend to pick up for a specific Yoga practice?

[Andrewww]

Online I see a lot of kundalini yoga videos but I hear K yoga isnt the safest, other types of yoga I have to dig and have wasted much time am ready for books. What do y'all recommend?

 

I'm looking more for increase in consciousness/purifying of traumas rather than physical strength type of yoga, but strength is good too.