I'd rate Haynes slightly better than the others like Chilton's or Motor's,only because most of theirs include a wiring diagram,but in many cases its a poo reprint of the factory one thats barely readable ...
I'd rate Chiltons as the poorest,they often tell you to remove things that dont need to come off to do repairs,or the next page will have a "Warning--do NOT do this when you remove this part--AFTER you already did it!..best to read the whole procedure thru before putting a wrench to anything...example--the early Ford FWD cars had the front diff set up in such a manner,if you removed both axles ,the diff would drop to the bottom of the case!..

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...they decided to warn you about that on the page AFTER it said "remove axle shafts"and told you how Ford and aftermarket tool makers sell a plastic "dummy" axle shaft to insert before you pull both axles--why not put that in capital letters on the page before they say to remove the axles?.....you had to gut the entire transaxle to put the diff back in place....Sometimes I can imagine the authors who wrote the book having a good laugh over the un-nessasary work and greif they put us thru!...
"That'll teach them to fix their own cars!"..
Cant beat the GM manuals,I go to a library not far off in another town that has a lot of them,including the hard to find ones for wiring and vacuum/emission diagrams...they are so big you need a table to yourself to open one up and read them,and you can actually see where each wire goes,what color codes they are,etc...