This is your book:
http://www.aeropresse.com/les_plus_aeronautiques/livres/Mirage-F1/Mirage-F1.php
In fact, just volume 1 which is almost a 196 page designs and development compilation of "arrow wing Mirage" comprised between the Mirage III relatives and Mirage 2000 relatives.
The Armée de l'Air Mirage IVA mission was strategic reccon and nuclear weapon delivery. From a quick search, the first Mirage IVA follow on would have been into the F2, F4 and IVF series by 1964-65. There are designs ranging from 18 to 30 m in lenght.
In 1968, "le bureaux des matériels" published a specification for program RAGEL (long range reccon, attack and electronic warfare aircraft) and Dassault submitted a design from the G4 family which had evolved from that 1964 studies I refered before. In fact, the 23,5 m long Mirage F4G has been proposed as a IVA follow on in September 1964.
Then the G4 evolved into the G8 and later (1972) into the fixed arrow wing G8A Super Mirage (Avion de Combat Futur) which suffered cancelation in December 1975. It was considered too expensive to be easy exportable.
http://www.secretprojects.co.uk/forum/index.php/topic,2418.0.html
The ACF was a multirole aircraft tasked with both interception and attack. So it was not only a Mirage IVA replacement, but also for the Mirage III and F1 tactical aircraft. At 19 m lenght and 29000 Kg MTOW, it wasn't really far from the McDD F-15 Eagle dimensions.
At the end, it was the Mirage 2000N armed with the ASMP missile which replaced the Mirage IVA. ASMP development started in 1978 and Mirage 2000N followed in 1979.