Anyone knows where I can read the novel for this? And does this have physical books now?

You can start the novel on chapter 98 if you are reading chapter 66 of the manhwa. (make sure to also read the translator's disclaimer)

https://docs.google.com/document/d/1jUJUzMf207jT3qH6U-I4qhoGHsRy34AURjXavOyOyYE/edit?tab=t.u5d1pktt89ol#heading=h.d6vkt5i0n6iu

I am not the translator and don't own any of the translations btw. (credits to apple292008 on novelupdates) The translation and the raws of the side story is still incomplete however the main story (part 2) is complete. As for physical books and merch, it's probably going to be out somewhere next year once part 4 (the final part) is released. Part 4 is schedule to be out on second half of 2026 with 100 chapters all released in one single batch! (๑•ㅂ•)و✧

Forgot to mention, start from part 1 chapter 98. Part 1 and 2 are main stories and part 3 is aftermath. (=・ω・=)