Tristan Hughes has writen a brilliant book about the years immediately following the Death of Alexander the Great. As Tristan says, history didn't just stop at Alexander's death and start again when Rome takes on Carthage. And in fact this period is one of the most fascinating and eventful in ancient history. It is also one of the most confusing and I hope this podcast is both entertaining and clarifying!
And check out HistoryHit. When not writing histories Tristan is a presenter with them - probably the most extensive and certainly one of the best online resources for history. Incredibly wide in its range and absolutely top quality.