book ideas, car security guide?

I've decided that I'm going to write a book or maybe two as an all-purpose reference for Car Security/Remote Starts/Convenience, and since this forum is full of people who care about the subject I think you guys and gals would be able to help me out with some ideas.

Right now I'm thinking 3 sections - one for customers (trying to learn a bit before going shopping), one for sales people (enough detail to help converse intelligently) and of course one for installers (I'd like this to be regarded as a good complement to MECP guides).  Levels of detail naturally increase with each section.

What would everyone like to see in such a book? There's not a stupid idea you can post here, honestly.  New installers especially I'd like to hear from since the technical section would be mainly towards you all.

Weird questions customers always have? Things that you think are lacking in product manuals? Vehicle/brand specific info? I'm planning on making at least part of this book(s) long enough to get really gory.

Thanks a bunch in advance as always.

Just stress that in most cases you get what you pay for.  If you purchase a $29 remote start unit and pay $29 to install it I can almost guarentee it will have shortcomings.

It would also be beneficial to explain to "customers" that every car is different, and as such, will require different parts.  It is a GREAT idea for the consumer to research THEIR vehicle so they know EXACTLY what parts are needed.  This will prevent shops from nickel and diming the customer who has no idea what all is needed to make things work correctly.

How will you be handling royalties?   :)

Royalties haha...that'd be a little presumptuous of me at this point.

I'm definitely going to stress install quality - and not buying "direct from Hong Kong distributors warehouses" on eBay.   

this is sure going to be a long task, but in the end it pays off to know you helped some individual.