This book is dated, and the plot took a while to sink in for me. However, once I got into the swing of things, I enjoyed this book very much.
Because the amount of artwork by any given artist is finite, discovering that there may be an undiscovered work by a famous artist is a huge discovery in the art world. When an art student studying abroad hears that not all of Modigliani's works are available, she delightedly decides to find the one that was reputedly hidden during the War.
The many twists of the plot are difficult to follow until they tie together at the end of the book. The plots do fit nicely! but it is confusing to follow throughout the body of the book.
This is not Ken Follett's best work. However, for an early work, it's quite good; furthermore, it's a lot better than a lot of the drek that some authors are trying to pass off as literature.