Many of you have asked.....
There are many excellent books out there that can support the study manuals authorised by the ACCA. The two authorised manuals are provided by BPP and Kaplan. They are good and you will need them to guide you through the subject.
The problem with recommending texts is that none are a perfect fit. However, with some careful cross referencing of chapters with those in the study manuals the following provide excellent sources to help you develop to the level you need:
Pike and Neale (2005) Corporate Finance and Investment FT/Prentice Hall. This book covers a wide range of the P4 syllabus but is a bit thin on acquisitions and valuation. But it is a great book for just getting to grips with it all.
Ryan (2007) Corporate Finance and Valuation, Cengage. (Well you didn't think I wouldn't give it a plug)
Both of the above will help build your finance base above F9. My book is pitched at a slightly higher level than Pike and Neale which is a strong undergraduate level text. If you have used Brealey and Myers 'Principles of Corporate Finance' then this too is a great book but does have a US edge to it.
Cuthbertson and Nitzsche (2009) Financial Engineering - derivatives and risk management, Wiley. This covers most of the treasury work that is required at P4 and will serve well if you decide to go on and do a finance oriented MSc or MBA, or indeed the CFA.
For those who want to get into derivatives Whaley's Derivatives (Wiley) is excellent. For valuation Damodaran's 'Investment Valuation' (Wiley) and Koller, Goedhart and Wessels 'Valuation' (McKinsey) are very solid texts.
For more general reading on the operation of financial markets I recommend Fabozzi, Modigliani and Jones 'Foundations of Financial Markets and Institutions' (Pearson).
On top of that you need to become an avid reader of the FT, Student Accountant and www.CFO.com.
The other route to success is to find a great teacher who doesn't kid you that you can pass in three months. You can't - it takes a year to get to P4.