"The Mexican Mafia" by Tony Rafael was ok. I learned things. I would recommend it.

Be aware that Mr. Rafael is very anti-immigration and that perspective colors his book. Another interesting tidbit detailed in the book is the true story of Rudy "Cheyenne" Cadena, fictionalized as Santana in the film American Me.

"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming

Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.