Piano Sight-Reading, Vol. 2: A Fresh Approach Paperback – March 1, 2005

As the description says, this book has a lot of beginner sight reading exercises. It's a great book to go through at least once, but probably two or three times. It is probably best for people that are not complete beginners.

This is the smartest approach to learning sight reading. Don’t miss it

This an outstanding series of sight-reading. The early part of the book is in a 5 finger position in both hands.It is in a gradual progression of difficulty and is an excellent introduction to sight-reading.

Sight reading is so important but difficult to do. This book has graduated exercises so you get better even if you only play a few every day.

Doesn't really teach any specific site reading technique.