I am an expert in a particular subject area and I've often had the position of training teams and individuals on the subject at previous employers. That includes the creation of written training materials.
I was recently downsized and I am considering writing a book in my area of expertise. Of course I will have to write about many of the same subjects that I was previously employed to teach and document. I will go out of my way to make sure that everything has original wording and contains no trade secrets. All content will be based on information that's available as general knowledge.
Are there any obvious risks in this endeavor? I would think that my previous employers cannot claim copyright or trade secret violations if I am using my own wording and the information is available as general knowledge.