As part of the revival of Vespers at the Vatican, in the hopes of spreading this liturgy throughout the world, the Vatican printed a special book of spiritual exercises for this Lent, based largely on the new Antiphonale from Solesmes. It incorporates all the work of the last 15 years toward the release of the sung Vespers. This book is an offshoot of that work. It is being used daily at St. Peter's. If you see pictures of the many gathered for these exercises, you will see this book.