4000-entry English-Arabic/Arabic-English dictionary with everything you could possibly need:
Clear Arabic script, for those who can read the Arabic script; and
Useful transliteration for those still learning to read it; and
Plurals to help with your command of Arabic
Plus an extensive phrasebook section so you can be understood all over the Middle East as you meet people, settle into your hotel, move around, go shopping, talk business, and so on.