Despite being considered inaccurate or highly 'biased' by some, Pappe's history review from the Palestinian point-of-view is shocking yet well-written description on the Zionist persecution of Palestinians. Although being a highly disputed book, The Ethnic Cleansing of Palestine is an eye-opening read to start unraveling the hidden history. I value highly that Pappe at least aimed to include many Palestinian sources (though perhaps discarding others) and challenged the status-quo of Israeli history writing.
Regardless whether one considers Pappe a reliable writer and historian or not, this book is a great start to finding the truth. It's probable, nevertheless, the truth is still hidden to a great extend, thus more high-quality research is needed. I hope to find some truly objective history reviews that include wide range of sources concerning the subject. Yet Pappe's work was an alright 'first introduction'.