He produced the book as part of his schooling and says, “…but the main problem was my strict limitation in time and money. Looking back I cannot understand how it worked! For my exam it would have been enough to do calligraphy for only one or two chapters. But I didn´t want to have a book with maybe twenty printed and 380 empty pages! That would not have been worthy for a Tolkien-work and I had better done a short story or so. But I thought: „This is your exam and maybe the last time that you can do what you want as an illustrator!“ So I did it, and couldn´t have done it with that fire, wouldn´t it have been a Tolkien-work. And although this was extremely hard, the fire did not cease.”
The Tolkien Library has an interview with excellent images. You can read the whole story right here.