Rejoice, O Unwedded Bride (Радуйся, Невесто Неневестная!) is a book of akathists published in 2004 by the Holy Trinity-St. Sergius Lavra in Russia. It is the most exhaustive book of its kind that I have ever seen. It includes numerous akathists in honor of various miracle-working icons (Vladimir, Kazan, Kaluga, Minsk, Smolensk, Jerusalem, Surety of Sinners, Unexpected Joy, Troeruchitsa) and feast days (Dormition, Nativity, Annunciation, Presentation) as well as the Paraklesis service. The text is in Church Slavonic, but with Russian typography. Printed on high quality paper.
My only gripe is that the compilers did not include a calendar as an index. However, the dates of commemoration are listed at the end of each akathist after the troparion and kontakion.
Unfortunately, the book has been out of print for some time. However, there is another which is very similar called Full Book of Akathists to the Mother of God (Полный Акафистник Пресвятой Богородице) which divides the contents into two volumes and includes several akathists not found in the above (Kursk Root, Montreal Iveron).