Vinay Khetia

S/A

To my knowledge there is no specific book of duas written by the 12th Imam (ajt). What we do have is a series of letters ( tawqi'at) attributed to the Imam many of which which were written by him or dictated by him. As for dua's there are numerous ones that are attributed to the Imam and can be found in early sources such as Misbah al-Mutahajjid of Shaykh Tusi ( d.460 Ah). Sh al-Tusi had numerous turuq or isnads reaching contemporaries of the Imam during ghayba al-sughra as did later scholars such as Ibn al-Mashhadi who narrates the famous Ziyarat Al Yasin which was taught by the 12th Imam when we wish to turn to him and seek his guidance. To conclude, there are numerous supplications and even some ziyarat which can be reasonably traced back to the 12th Imam. However there is no book written by him per say at least in any extant surviving form.

wa Allahu al-'alim,

And God is the knowing, 

ws

Sh.Vinay Khetia

Salaamun Alaykum neither are technically haram  but both lead to haram things or bad situations. What is haram is to engage in any interaction that is lustful leading to something indecent. It is for this reason that Islam has very clear guidelines when it comes to interaction between opposite genders (who are not mahram) and that is it should be formal and not be lustful in anyway nor leading to that situation.  This may even include listening to her voice if that becomes something that contributes to lustful feelings and certain imaginations. My advice to you is to get married as soon as possible either permanently or temporarily since interacting with a non-Mahram outside of official work or clearly defined formal work is not appropriate whatsoever as it very often leads to a situation that is not becoming of a mu'min or mu'mina.