If you're a bit lost navigating the sometimes complex web of interconnectivity between the various Star Trek novels in the modern continuity, here are the answers to your questions. TrekBBS user Thrawn found a most elegant solution, with his brilliant Star Trek Lit-Verse Reading Order Flowchart. Now on the Mark II version, Thrawn and I guide you through the world of Star Trek fiction.
Whether you're a fan of TNG, DS9, Voyager, or Enterprise the chart below will show how they spin off into New Frontier, Titan, Klingon Empire, or Vanguard, and crossover into Destiny, the Typhon Pact, the Mirror Universe, and more; letting you chart your own path through the Trek-litverse. Once you've got to grips with the flow chart you might also find some of my lists a useful reference too. Click the image to view larger:
Many thanks to Thrawn for allowing me to share this fantastic resource with you.