Should it be "बिस्तर पर (ayk) किताब है। ? Ta.
What is 'ayk'?
He mean एक.
@icanconfirm - Hindi doesn't require articles but you're free to use them if you think that you sentence may otherwise become ambiguous.
He means 'एक' (ek). Native speaker here, 'Bistar par ek kitaab hai' sounds more natural than omitting the 'ek'