Of my 4 novels, I have two of them going for $.99 or 70p on Amazon
Out of Time, which is my time travel novella
A scientist discovers time is actually fluid; past, present, and future all exist at the same time. What he doesn't know, is if the current timeline can change when something is changed in the past. The US government wants him to find out. The theme being to make right what once went wrong. The time travelers meet all sorts of 20th century icons, from the Titanic to Anne Frank to Roswell to the Apollo 13. However, someone is trying to stop them, and the future may never be the same again.
http://www.amazon.com/Out-of-Time-ebook/dp/B0014FX2FA
http://www.amazon.co.uk/Out-of-Time-.../dp/B0014FX2FA
Don't Mess With Earth, a science fiction novel
Humans discover that two groups of aliens have been manipulating human history since the pre-historic days. One group does this by posing as historical figures such as King Arthur, Galileo, Amelia Earhart, among others. The other group causes all sorts of historical anomalies such as the Salem Witch Trials and the disappearance of the Roanoke colonists. Centuries later, when the humans from the country called the United States get a chance to study the technology of a downed alien ship in Roswell, they decide to do something about both groups of aliens. Once the scientists of Earth start reverse engineering the downed spacecraft, President Truman issues an executive order that will forever change Earth history.
http://www.amazon.com/Dont-Mess-With...dp/B004MYFSYI/
http://www.amazon.co.uk/Dont-Mess-Wi.../dp/B004MYFSYI