I hope that you will forgive a little piece of self-promotion but Sophia Moestrup and I have just had published an edited volume. It is called Semi-presidentialism in Central and Eastern Europe. It is published by Manchester University Press at a cost of £60.00. Details are available here.

The chapter list is:

1. Semi-presidentialism: a common regime type, but one that should be avoided? – Robert Elgie and Sophia Moestrup
2. Belarus: a case of unsuccessful semi-presidentialism (1994-1996) – Andrei Arkadyev
3. Semi-presidentialism in Bulgaria: the cyclical rise of informal powers and individual political ambitions in a ‘dual executive’ – Svetlozar A. Andreev
4. Semi-presidentialism in Croatia – Mirjana Kasapović
5. Semi-presidentialism in Lithuania: origins, development and challenges – Algis Krupavičius 
6. Semi-presidentialism in the Republic of Macedonia (former Yugoslavian Republic of Macedonia) – François Frison-Roche
7. The impact of party fragmentation on Moldovan semi-presidentialism – Steven D. Roper
8. Semi-presidentialism and democratisation in Poland – Iain McMenamin
9. Romania: political irresponsibility without constitutional safeguards – Tom Gallagher and Viorel Andrievici
10. Russia: the benefits and perils of presidential leadership – Petra Schleiter and Edward Morgan-Jones
11. Slovakia’s presidency: consolidating democracy by curbing ambiguous powers – Darina Malová and Marek Rybář 
12. Slovenia: weak formal position, strong informal influence? – Alenka Krašovec and Damjan Lajh
13. Ukraine: presidential power, veto strategies and democratisation – Sarah Birch
14. The impact of semi-presidentialism on the performance of democracy in Central and Eastern Europe – Robert Elgie and Sophia Moestrup

There are lots of good things in the book, obviously, but you might be interested to know that all the contributors have calculated a presidential power score for their country on the basis of the Shugart and Carey framework in their Presidents and Assemblies book.