If you are looking for a series to read while waiting for the next Jack Reacher or Mitch Ryan novel to be released, try Gray Man by Mark Greaney: http://catalog.ccls.org/search~S1?/tgray+man/tgray+man/1%2C2%2C4%2CB/frameset&FF=tgray+man&2%2C%2C2/indexsort=- . Gray Man is a world class assassin.He is a former special forces and CIA agent who got burned and now kills but kills only those who really deserve to die. The novel has Gray Man racing across Europe to save a kidnapped family while twelve assassin groups chase him. Whoever kills him gets millions of dollars.
Gray Man is a gritty page turner. Great to read while waiting for the next Jack Reacher book.