This book will focus on the rights each spouse has under certain laws, situations, and circumstances, and how the division of the property will be decided by the court or through negotiation.
Since they've been exercised, their value has been established. The proceeds go into joint assets to be split. The taxes go into joint debts also to be split.
You can try to get the accounting done as of the separation date but accounting under family law can be quite loose. You have a lot of latitude to negotiate. Find something that works. Don't sweat the accounting details.