Bækur frá David Spencer

• 

  

  Introducing Focus: The Ultimate Guide to Achieving Unbreakable Focus, Increasing Your Productivity, and Sharpening Your MindDavid Spencer
• 

  

  Declutter Your Life: 50 Steps To Help You Start Decluttering Your Mind And Start Organizing Your Home Life, Work Life And Personal Life ImmediatelyDavid Spencer

  2
• 

  

  Upgrade Yourself: 2 Manuscripts: Introducing Focus & Introducing Body LanguageDavid Spencer
• 

  

  Improve Your Memory: A Guide to Increasing Brain Power Using Advanced Techniques and MethodsDavid Spencer