Raellus,
This should get you started on books:
http://www.30degreessouth.co.uk/
However it should be noted that Cuito Cuanavale, from what I have researched,
was more of a stalemate on both sides. Cuba had an extensive infrastructure in place in Angola by 1987 and the Soviets provided both sea an air transport to keep the logistical chain going for them. The initial Angolan/Cuban offensive (IIRC, 6x Bdes)against UNITA was decisively stopped by about a Bdes worth of SADF/SWATF units. The subsequent 'battle' of Cuito Cuanavale was more of a siege where the Angolan/Cuban forces couldn't push out east while UNITA/SADF couldn't push the Angolans/Cubans out of the town. What really broke the stalemate was Castro had the Soviets help him build up a Div sized force in SW Angola to threaten SWA (Namibia) and the Calueque dam/hydroelectrical complex (this was on the border between the two countries and had previously been considered off limits). The South Africans realized to counter this a massive callup of Citizen Force Units would need to happen (a CF Bde already replaced regular units at Cuito Cuanavale) which would disrupt the economy and put 'The Border War' on the front pages. IIRC, the South Africans made it known quietly that they were 'prepared' to callup the entire CF (a Corps of 2 + Divs) to counter a Cuban invasion. Thus both sides were able to head to the peace table after 'saving face'.
Obviously I gave you the short version, but one of the best books I've read on the subject is 'The War for Africa: Twelve Months that Transformed a Continent'
http://www.amazon.com/gp/product/187...w_bottom_links
Try this one also 'War in Angola: The Final South African Phase'
http://www.amazon.com/War-Angola-Fin...=war+in+angola
This book is coming out in June/July ' The Last Hot Battle of The Cold War'
http://www.amazon.com/LAST-HOT-BATTL...=war+in+angola