You won't find the argument you just used in any modern biology book. In fact, I have one of my college Vertebrate Zoology books on a shelf right next to me and it actually takes the time to debunk the whole "tail" nonsense. The book is over 10 years old, by the way, so your info is way outdated.
Saying every vertebrate had a tale is just as silly as saying every vertebrate had gills (those supposed "gills" are actually just folds).
The biogenetic law has been completely done away with in evolutionary theory.
http://8e.devbio.com/article.php?id=219
Seems like you're the one who needs to read a book. Keep yourself updated.