I am a fan of this author's work. I really enjoyed his prior books in this series and his Deacon fantasy series.
In Book 4, our hero grows up a little bit and Ma, the computer grows a lot. Once again Lex is saving the universe, our crazy engineer/scientist is even "madder" in his crazy way, and we get to visit the past, present, and future.The scope of the plot was larger than Lallo's prior books in the series and was well done. It didn't have quite the same level of humor or laughs that his prior Big Sigma books gave me, but it's still a 5-star book in a great series that will appeal to every space opera science fiction fan and anyone that likes the old fashioned type of sci-fi story. Aficionados of heros, spaceships, computers, crazy scientists, world and universe building will enjoy the Big Sigma series.