Rabbeinu Yeruchem’s work contains three parts one called Meisharim and the remaining two parts entitled Toledot Adam ve-Chava. The part Adam contains everything relating to the man from birth until marriage; whereas Chavah contains everything from after marriage until death. This work was first printed in Constantinople in רעו (1517) and is extremely rare; only two complete copies are known to be extant. It was reprinted a second time in שיג (1553) in Venice; this is the version available today in photomechanical off-set     

Just to give a brief overview of this work, as mentioned before the earlier editions of the Rabbeinu Yeruchem are full of printing mistakes and is missing many pieces. What R. Chazzan did was to track down the existing manuscripts of the sefer and try to fix the mistakes and put in the missing pieces. He also puts in the sources of Rabbeinu Yeruchem and he brings down where it is quoted in various poskim. He retype-set it beautifully making it a pleasure to read and use in compared to the old print.

So far only the third volume (the חוה section) has been printed