Notability tagging
You put a Notability tag on Secretariat (book). There are two problems with your action:
 1) Secretariat is one of the most notable horses in the history of American Thoroughbred racing with a worldwide reputation, was listed by ESPN at No. 35 of the 100 greatest athletes of the 20th century, one of three non-humans on the list, and the United States Postal Service honored Secretariat with his image on a first class postage stamp with. Any Secretariat book put out by a reputable publisher is in absolute fact worthy of an article at Wikipedia;
 2) You ignored the Wikipedia:WikiProject Thoroughbred racing when in fact you should have referenced your Notability "concern" with them. Worse though, is that you did this twenty-nine minutes after I had created the TALK page with the Project's tag placed there which showed up on the Edit Summary for New Articles. 

I will take this is an honest error because otherwise it is simply very bad manners and an abuse of editing privileges that wastes other editors' time and confuses readers.