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 ...

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...

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...

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...

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...

Stretch yourself to achieve the highest grades, with structured syllabus coverage, varied exam-style questions and annotated sample answers, to help you to build the essential skill set for exam success.- Benefit from expert advice and tips on skills and knowledge from experienced subject authors- Target revision and focus on important concepts and skills with key objectives at the beginning of every chapter- Keep track of your own progress with a hand...

The ‘Cyprus Problem’ – also known as the Cyprus dispute, Cyprus issue, Cyprus question or Cyprus conflict – is an ongoing dispute between Greek Cypriots, Turkish Cypriots, Greece and Turkey. It has bedevilled not only their relations, but also those within the European Union, NATO and the United Nations, for more than 60 years.Following a long insurgency against British colonial rule, Cyprus gained independence in 1960. Almost immediately, high tension emerged between the Greek and...

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...

Did it start with whispers in the wind? Was it all Michael's fault? Blame has a time and a place, but now blame is too late and of little consequence. The real aftermath will unfold, and like so many of us who have wrestled with our inner thoughts and felt as though we were clinging on, Michael's soul will unravel from the process of life to the factory farm of reincarnation. It is no battery farm, but a mechanism of factuality to which the universe was created and it will be damned if it ...

For years, PC David Watson was a policeman of the old school. He patrolled the towns and cities of England's north by car and on foot, where a fight against crime lurked around every corner. Until, one day, disaster struck - albeit from an unexpected direction.A near fatal encounter in the Scottish Highlands left the Yorkshire bobby inches away from death and with just about every bone in his body shattered. Indeed, had it not been for a miracle intervention, his story would have a...

In the late nineteenth through mid-twentieth centuries, the anarchist effort to promote free thought, individual liberty, and social equality relied upon an international Spanish-language print network. These channels for journalism and literature promoted anarchist ideas and practices while fostering transnational solidarity and activism from Buenos Aires to Los Angeles to Barcelona. Christopher J. Castañeda and Montse Feu edit a collection that examines many facets of Spanish-language an...