A recent book on Eliade I have just noticed: Marcello De Martino, Mircea Eliade esoterico. Ion Petr Culianu e i “non detti.” Rome: Edizioni Settimo Sigillo, 2008. 524 pp. €29.50.
To judge from reviews and an interview with the author, De Martino looks into Eliade's early thought. He argues that Eliade first encountered the philosophia perennis through nineteenth-century sources such as Papus before encountering the work of Guénon. He also looks at Eliade's early views on magic, which seem very much influenced by Evola.