This may be a touchy question but I am considering using ShareLaTeX for a book I am working on. I am beginner in LaTeX and ShareLaTeX seems very easy to use and user-friendly. However, since I eventually plan to publish this book I am concerned about security at internet sites like ShareLaTeX. I am not going use "group" (paid for more than 2) feature if I decide to go with ShareLaTex. My second question concerns portability. Can I go back and forth between my own computer (where I have installed TeXshop) and ShareLaTex or are there some issues or concerns I should worry about? Any thoughts and/or ideas are greatly appreciated.
Thanks in advance.