Building Technique Book 2

Building Technic Step by Step Book 2 is written by Louise F. Pratt. 
Lever or pedal harp.
Late Beginner to Advanced level
The level of these exercises extends from the late beginning up to advanced technics.  The studies are progressive through each section.  
This book is thorough in the approach towards strengthening the fingers, developing finger independence or coordination, learning fingering patterns, understanding chord spacing, etc.