Sent to a remote village to live with their grandmother, twins Claus and Lucas devise physical and mental exercises to render themselves invulnerable to the ongoing horrors of war and living under a totalitarian regime. When their bond is tested, their collective ‘we’ shatters and the boys become isolated in different countries. Lucas is challenged to prove his identity and that of his missing brother, a defector to ‘the other side’.Kristóf’s haunting and unforgettable masterpiece ...

Brought to you by Penguin.Sent to a remote village to live with their grandmother, twins Claus and Lucas devise physical and mental exercises to render themselves invulnerable to the ongoing horrors of war and living under a totalitarian regime. When their bond is tested, their collective ‘we’ shatters and the boys become isolated in different countries. Lucas is challenged to prove his identity and that of his missing brother, a defector to ‘the other side’.

Carbon Dioxide for Pool pH Control is a practical field guide for pool technicians, aquatic facility operators, consultants, and maintenance professionals responsible for managing commercial swimming pools and spas.For decades, carbon dioxide has been used as an alternative to mineral acids for pH control. Yet the technology remains surrounded by folklore. Operators are told that CO₂ causes runaway total alkalinity, consumes excessive gas, cannot cope with heavy ba...

Why ORP Systems Fail – and How to Stop It is a practical guide to understanding ORP, pH, chlorine, chemistry, hydraulics, and automatic pool control systems in real-world aquatic facilities.For decades, pool operators have been told that ORP is unreliable. Controllers are blamed for unstable readings, overdosing, underdosing, and poor water quality. Yet many of these problems are not caused by the controller at all.They are caused by misunderstanding the sy...

CO₂ for Swimming Pool pH Control - Explained ProperlyMost pool operators have heard conflicting things about CO₂ systems.Some call them unreliable. Others say they raise alkalinity. Many simply avoid them.This book cuts through the confusion.This is a practical, field-based guide to understanding, installing, and operating CO₂ systems in real-world swimming pools.Rather than repeating industry folklore, this book explains what actual...

ORP controllers can overdose a pool to 30 mg/L of chlorine while showing a perfect reading. This book explains exactly why - and how to stop it happening.Oxidation-Reduction Potential control is one of the most widely installed and least understood technologies in recreational water management. Pool professionals learn to calibrate the equipment. Very few learn how ORP actually behaves inside a real, operating water body - and what it cannot tell you.This b...

Read by the authors.It is hard to deny that today’s world can seem apathetic toward Christians. Some may look down at their iPhones when we mention God, motion for the check when we bring up church, or casually change the subject when we talk about prayer. In a world full of people whose indifference is greater than their desire to know Christ, how can we dream of growing the church?In Contagious Disciple Making, David Watson and P...

Read by the authors.It is hard to deny that today’s world can seem apathetic toward Christians. Some may look down at their iPhones when we mention God, motion for the check when we bring up church, or casually change the subject when we talk about prayer. In a world full of people whose indifference is greater than their desire to know Christ, how can we dream of growing the church?In Contagious Disciple Making, David Watson and P...

'If only one could have two lives: the first, in which to make one's mistakes…and the second in which to profit by them.' (D.H. Lawrence)"David Watson's writing speaks into our lives with the same freshness and relevance as it did 35 years ago. This little booklet, filled with the hope and love of Christ through his Holy Spirit, reminds us that it is never too late to Start a new life; and then to be changed and renewed daily by the Holy Spirit."Dr John Sentamu, Archbishop o...

Facing the final test of faith, David Watson candidly shares his personal thoughts during his moving struggle with cancer: his doubts and fears but also his ability to trust in God and fear no evil.David Watson was an internationally renowned and much-loved preacher and writer. His many books include Discipleship, I Believe in the Church, Is Anyone There? and One in the Spirit. He died in 1984, a few weeks after writing the final pages of this bo...

This title is endorsed by Cambridge Assessment International Education to support the full syllabus for examination from 2021.Develop computational thinking and ensure full coverage of the revised Cambridge Assessment International Education AS & A Level Computer Science syllabus (9618) with this comprehensive Student's Book written by experienced authors and examiners.- Improve understanding with clear explanations, examples, illustrations and diagrams, plu...

What is life really all about? So many people today feel that their lives have little or no ultimate purpose. The world seems hard and cruel. Life seems terribly cheap.In this short booklet, David Watson explains how we can know God is with us, and experience direction and purpose in our lives.