With every NAV system distribution there have been some reference guides. These are minimal in NAV 2015. There are previously published guides available, but sometimes we have to search for them. Some were distributed with previous versions of the product but not with the latest version. Some are posted at various locations on PartnerSource or another Microsoft websites. Some may be available on one of the forums or from a blog.
Be a regular visitor to websites for more information and advice on C/AL, NAV, and other related topics. The websites dynamicsuser.net and http://www.mibuso.com/ are especially comprehensive and well attended. Other smaller or more specialized sites also exist. Some of those available at the time of writing this book are:
Microsoft Dynamics NAV Team Blog: http://blogs.msdn.com/b/nav/
Mark Brummel's Blog: http://nav-skills.com/blog/
Clausl's Dynamics NAV Blog: http://www.mibuso.com/blogs/clausl
Waldo's Blog: http://www.waldo.be/
Vjekoslav Babic's...