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Mark Crossthwaite
Mark Crossthwaite is the author of several books on Grants and Brainwave Entrainment.Mark is now living in beautiful Alaska with his loving wife and children. His adventuring spiri...ver maisMark Crossthwaite is the author of several books on Grants and Brainwave Entrainment.Mark is now living in beautiful Alaska with his loving wife and children. His adventuring spirit has unleashed the creative side in him. He is understanding, warm, and intelligent as it comes out in his writing.ver menos