My hunch seems to have been correct, assuming the book is not just about Necronomicon but is a translation thereof.
Where can the Necronomicon be found?
Nowhere with certainty, is the short and simple answer, and once more we must suspect Crowley in having a hand in this. In 1912 Crowley met Theodor Reuss, the head of the German Ordo Templi Orientis (O.T.O), and worked within that order for several years, until in 1922 Reuss resigned as head in Crowley's favour. Thus we have Crowley working in close contact for 10 years with the leader of a German masonic group. In the years from 1933-38 the few known copies of the Necronomicon simply disappeared; someone in the German government of Adolf Hitler took an interest in obscure occult literature and began to obtain copies by fair means or foul.
Dee's translation disappeared from the Bodleian following a break-in in the spring of 1934. The British Museum suffered several abortive burglaries, and the Wormius edition was deleted from the catalogue and removed to an underground repository in a converted slate mine in Wales (where the Crown Jewels were stored during the 1939-45 war). Other libraries lost their copies, and today there is no library with a genuine catalogue entry for the Necronomicon. The current whereabouts of copies of the Necronomicon is unknown, but there is a story of a large wartime cache of occult and magical documents in the mountainous Osterhorn area near Salzburg - this may be connected with the recurring story of a copy bound in the skin of concentration camp victims.