Paul Gordon 
Absolute Freedom: An Interdisciplinary Study [PDF ebook] 

Part I of this book gives particular attention to freedom as an "aesthetic idea" that informs certain philosophical discussions of freedom in Kant, Schelling, Nietzsche, Sartre, Camus and Isaiah Berlin. The critical concept of "positive freedom" is discussed in the first chapter and continues to inform the entire book. In Part II, the more "practical" application of these ideas with respect to certain "zones" of freedom such as academia ("academic freedom"), religion ("religious freedom"), art ("artistic freedom"), "free speech, " and "political freedom" are discussed Finally, in the Epilogue, the surprising relationship of "friendship" to "freedom" that begins with their close etymological relationship is discussed.