UK Phantoms of the Quantum Rift
"I've read a few romantic/ paranormal type books with portals in them, but this is the first time I've been given a convinicing scientific explanation! I enjoy your creative science-thinking, but also enjoyed the human interest element of Phantoms. The end left me a little wistful for Dave, but I like to think he will get his Susie back."
US Phantoms of the Quantum Rift
Fun Time!
The First Completely Electronic Robot and Science Fiction Limerick Book - revised edition

- still free on Amazon UK after 13 weeks
Both UK and US versions contain sample chapters of the SF novels:
Passengers to Sentience
Passengers to Zeta Nine