Natalie (Nat) was a child in an adult's body with her grandfather's implanted memories. Alone on an alien planet, she learned to survive and thrive. She fought slavery locally, then planet-wide, then across the Milky Way. When she learned to travel to other dimensions - associations between species became blurred and battles became horrific. Now - throw in near-immortality and extra-galactic threats and you have an interesting story. Carole, (from Uplift) is stranded in a remote area of the Milky Way and has to fight her way back to Earth. She learns to love travel and trade as she trains her disparate crew. Nat and Carole join forces to fight the slavers. Though MULTIPLE could stand alone - you would understand more if you have read Trade World Saga, Connection, or Uplift. If you've read them all - MULTIPLE ties them all together in the Trade World Universe.
Ken R Pence, Ph.D. is a professor of engineering at Vanderbilt University. He is a retired captain from the Metro Nashville Police Department where he served 31 years (16 on SWAT) and has taught police and military in the US and Europe (England, Germany, France, and Northern Ireland) in confrontation management skills. He has researched sniper shot location for DARPA, acoustic sensors to protect African elephant herds and inexpensive magnetic levitation. He lives in Nashville with his wife and his large - drooling - black lab (Drools Verne).
Attempt to tie all the previous books together in one universe, nice ideas and good new character, but winds up just being a mess. For Heinlein sake, GET AN EDITOR! Switching from first person to third and back in one paragraph (repeatedly), using wrong name of a character, run-on sentences, misused quotes, missing paragraph breaks... Really wish I could give it4 stars, but it's so messed up it's barely worth two.
Ken Pence is great at pushing the envelope of a genre. Multiple takes the concept of "dimensionalism" to a new direction...to paraphrase the great bird of the galaxy "boldly going where none gone before( but maybe Dr Who). Give it a read, give it time to digest... See how it sits. Read the other s in the series.