Pretty much how I found them and the Chris Ryan books. If you want something similar but usually with a bit of a historical/treasure hunt style try the Scott Mariani series about Ben Hope, former SAS major turned freelance kidnap specialist. A fun read and not to taxing.
Real page turners.
Ok he should have been killed 58 times in each book, but some of the ways he gets out of it are "creative" an sometimes corny, but the history aspects are good.