My opinion but auto repair manuals since the 80's are SHIT. Just look at a old Chilton's, I got a '68-72 Chilton, dude talk about learning, things like "Chilton time savers", pictures, diagrams and PART NUMBERS for special tools.
Haynes repair manuals are in general poorly written and their value to the professional repair/ service person are of little use due to the lack of specific content. The electrical wiring diagrams extending over multiple pages are confusing, poorly detailed, monochromatic.
When I need specific repair/service info I do not appreciate a section on "how to do body work and repainting"! When I need a section on air conditioning and it does not contain it, service info on how to repair an Alternator, Transmission, etc and I get a stupid statement to the effect that " this work is beyond the scope of this manual / home mechanic" I just want to tear the book to pieces and deep six it!!