Yup, got second one myself. Saves loads of trouble when submitting for visas while working or in case of loss. Letter from employer or sworn affidavit stating you work abroad and require second passport as backup while submitted for visas and in case of loss is all that's required. Passport office seem a bit uncertain to begin with as it's not a common thing, but as long as you guarantee security of passport either in your possession or in for visa (ie, not getting your cousin Rajneesh into the country on the sly), they're OK with it.