Sunday, August 4, 2019

Book Tour and Giveaway: Lifeliners by Stefan Vucak

Title: Lifeliners
Author: Stefan Vucak
Publication Date: August 20th 2018
Genre: Science Fiction
When everybody is against them, it is tough being a lifeliner, as Nash Bannon found out. Lifeliners are ordinary people…almost. They can draw energy from another person; they live longer and are smarter. Scientists claim that Western high-pressure living and growing sterility in developed countries has triggered the rise of lifeliners, and homo sapiens will replaced by homo renata within ten generations. So, what’s not to like about lifeliners? Protest marches by extremist groups, riots, attacks against lifeliners, repressive laws enacted by governments everywhere, were portents of a dark future. Young, successful, Nash Bannon did not like what was going on, but he thought he had the world at his feet and life in Australia was good, provided no one found out he was a lifeliner. A chance encounter with Cariana during a lunchbreak develops into something he considered important. The Australian government calls a snap election, and Nash stands as a Senate candidate on the Lifeliner Party ticket. Unless lifeliners rise up and fight for their rights, they can expect sterilization, incarceration, and possible extermination as democracies everywhere turn into autocracies. To survive, the Lifeliner Party must employ the same dirty tricks the government used against them, but they were not prepared for what awaited them.

Stefan Vucak has written eight Shadow Gods Saga sci-fi novels and six contemporary thrillers. He started writing science fiction while still in college, but didn't get published until 2001. His Cry of Eagles won the coveted Readers' Favorite silver medal award, and his All the Evils was the prestigious Eric Hoffer contest finalist and Readers' Favorite silver medal winner. Strike for Honor won the gold medal.

Stefan leveraged a successful career in the Information Technology industry, which took him to the Middle East working on cellphone systems. He applied his IT discipline to create realistic storylines for his books. Writing has been a road of discovery, helping him broaden his horizons. He also spends time as an editor and book reviewer. Stefan lives in Melbourne, Australia.

Space is NOT cold!
by Stefan Vucak
It amuses me greatly when an author waxes lyrical about ‘the cold deeps of space’! I just have to crack up. What is worse, some astronomers who should know better also shiver when talking about space.

Let’s get real, okay? Space is mostly vacuum. It is neither cold or hot…generally.

Let’s talk about temperature and what it is. Only an object can be described in terms of temperature, or kinetic energy of a body in motion, and that includes atoms if someone wants to get picky, but atoms are objects. There are only three ways that heat can be transferred: conduction, convection and radiation. Heat a pan and gradually, the entire pan will get hot. That’s conduction. A circulating liquid will over time distribute heat evenly within a given volume. That’s convection. Absorption of electromagnetic energy or subatomic particles constitutes radiation, the only mechanism where energy can be transferred in space.

That is our key! A body in space, an astronaut or spacecraft, will radiate in a temperature gradient. Simply put, unless an object in space is close to absolute zero—2.7 Kelvin, or 270.45C—it will radiate its energy into the surrounding vacuum. When an object absorbs more photons than it emits, it heats up. If it emits more photons than it absorbs, it cools down. Someone will say that space IS cold because of the Cosmic Microwave Background Radiation temperature of 2.73 Kelvin, the remnant of the theoretical Big Bang. Not so! What is being measured is not the temperature of space, but the energy of the omnipresent electromagnetic radiation.

The interstellar medium is mostly vacuum with an average distribution of one to six atoms per cubic meter, and they move very slowly. Why? They don’t have much energy. It has been radiated away long ago. There are regions of much hotter gas in supernova remnants that can reach temperatures of six million degrees C. However, that does not mean that space is that hot! It is a combination of photons, atoms and molecules that contain that energy which are hot—because they are objects!

If you are a writer, do yourself a favor. Don’t talk about the cold of space! Talk about cold objects. As for those cosmologists…check up your basic physics.
Win a $20 Amazon gift card or an eBook of Lifeliners by Stefan Vucak!
Follow the tour HERE for exclusive excerpts, guest posts and a giveaway!


  1. The cover art seems appropriate for the book. Good job.

  2. Love the cover

  3. This looks like science fiction that I enjoy reading - one that raises questions.

  4. The cover and book description look great!

  5. The Guest Post was informative. Thanks.

  6. Nice book cover and the book sounds interesting.

  7. Sounds like a great read! Love the lifeliners concept.

  8. I like the cover-thanks

    tiramisu392 (at)

  9. Cover is very interesting, kinda spooky. Thanks for sharing.

  10. Not my usual kind of read, but sounds interesting.

  11. This sounds like a really cool concept...can’t wait to see how well it is written ❤️

  12. What do you think of the book or the cover?
    its an amazing design,very cool composition