Many years ago I used to buy repair manuals from Haynes, but at this time I was disappointed with the book. I was looking for a very simple information on spark plug replacement on my 4 cyl. 2010 Tacoma. The spark plugs are comcealed with a plastic cover, but there was no information on how to remove it. The manual also had pictures of worn spark plugs with eroded tips and instructions on gapping the tips. The spark plugs on most new Toyotas are the new type long life  iridium plugs with fine center wire and not recommended for regapping. Some of the black and white pictures in the book are very low quality with hard to see details.