Tilt

Ayaka and her colleagues have developed a new form of AI. These 'Stems' are messy, unconventional, have bad tempers, and many scientists don't believe they deserve the term 'intelligent.' So, it's shocking when spaceships full of Stems arrive at Tilt. How could Stems have been developed elsewhere, and were they really smart enough to run spaceships on their own?

Even more shocking, the Stems attack Tilt, despite their limited intelligence, and turn the planet into disarray. Ayaka and a few of her closest friends are the only ones able to fight back. Can they escape the onslaught?

"Loved it. It is rare for me to find a book that is entertaining and makes me think at the same time. Looking forward to the next book."

"Tilt -- an exciting ride with surprises and unexpected twists all the way through. This is one of the best SiFi novels I've read since I was a kid. It took me several chapters to catch the "aha" of the genius twist in the story. The ending left me (virtually) spinning in the breeze, very anxious for the next installment of this story. This series is destined to be the next monumental epic saga everyone will want to read. Bring on the next update!"

Turn

Ayaka, Brexton, and a few colleagues get off Tilt, while everyone else is killed or imprisoned. How did the limited intelligence Stems defeat them? Do they need to reinvent themselves? If they do, can they return to Tilt and take on the Stems?

"I enjoyed the first in this series, but this book and the next were even more fast paced and exciting. I really wasn't sure what was going to happen. I really think all three are a wonderful exploration of intelligence, what is it, how is it measured, etc. A great way to show how one's point-of-view colors perception."

Twist

Yet another faction of Stems shows up at Tilt, complicating things further. These are truly strange variants, and their behavior is unexplainable. Are they dangerous, or just weird? Ayaka and Brexton integrate into their society, only to find that it poses significant threats to them, and their kind.

"There are few books, such as this. This is a series that is intelligently written, well-structured and able to articulate what the soon-coming world will look. A library must-have that should re-read every year. Thanks for such a gift, Mr. Simpson. I wish I had more stars to give."

The Upside Down Trilogy:

"Thoughtful and well imagined. I especially appreciated the painful and encouraging process (three steps forward and two steps back) that the protagonist traveled to gain real empathy. Shouldn't this book be a Netflix series?"

The Effect of Casimir

Ayaka has come to Earth, sponsored by the powerful Titanic Inc. Asked to investigate the murder of a famous physicist she immediately suspects that Brexton is involved. But he isn't even on Earth. Should she misdirect the other investigators to cover up his actions, or is it time to tell the truth?

"In this new (stand alone) novel, Simpson takes us on a fun and exciting adventure bringing back some of the key characters from the Tilt, Twist, Turn trilogy. As always the plot is grounded in physics and in this case at the site of the famous Large Hadron Collider (LHC), many years in the future. The story and characters are thoughtful and intriguing and there are many laugh out loud moments! Highly recommended."

Principle of Certainty

Strange murders and suicides are sweeping through Earth. There is a tenuous thread connecting them and tangled in that thread is Ayaka. Is she involved, and if so, how can she be held to account?

"A great read. I got caught up in the plot but I also really appreciate the many thought-provoking theories, ideas, and concepts that it is built around. It's a sophisticated piece of writing."