A nice touch is the illustrated dust jacket that unfolds into a poster.
High Pressure Boilers Study Guide by Harold J. Frost
This novel is built around a central mystery that keeps you hooked.
HIGH PRESSURE BOILERS STUDY GUIDE BY Harold J. Frost PAPERBACK **1000**
You will find that this activity book works well for both kids and adults.
High Pressure Boilers
This activity book turns math practice into a game of matching and guessing.
High Pressure Boilers Study Guide – 6th Edition
This illustrated novel uses comics to advance the main plot.
