Other Intelligences (like Children of Time)

So I'm fascinated by intelligence and how it works. I've read a lot about human intelligence, and a lot about robotic/artificial intelligences. One of my favorite/most impactful series growing up was Asimov's Robots for the three law thought experiments. I'm currently reading Children of Time, and this reinvigorated my interest in more stuff that explores other "alien" intelligence.

I'm looking either for more fiction that really explores what other thought patterns may look like with significant complexity, or for evidence based research books on other forms of intelligence on earth like Tchaikovsky could have used as reference material.