I purchased two...
Carl Munroe's book has more history, numbers, and comes across more organic - easy read and easy to follow - and has a whole section on performance, which is excellent. I use this book for more insights and tweaks.
Tom Hand's book is very, very good, great pictures, and great for step-by-step trans building. I use this book for a core reference in assembly, especially.
Essentially, I like/use both.
Torqueflite A-727 Transmission Handbook HP1399: How to Rebuild or Modify Chrysler's A-727 Torqueflite for All Applications, by Carl Munroe
ISBN-10 : 1557883998
ISBN-13 : 978-1557883995
Chrysler TorqueFlite A-904 & A-727 Transmissions: How to Rebuild (Workbench How-to), by Tom Hand
ISBN-10 : 1613253354
ISBN-13 : 978-1613253359