My understanding of the French language is limited.
From what I can gather, Mayette Magie Moderne have published a book featuring the magic of Gaetan Bloom that was published in "Le Magicien" between 1992 and 1999:
The book is reviewed on another French web site:
Can anybody shed further light on "Bloomeries"? I've tried using the 'translate this page' option in Google but this results in somewhat garbled translations.