You have already been provided with a link to the contemporary catechesis concerning the Carmelite scapular. This catechesis was done by both branches of Carmel – the Ancient Observance as well as the Teresian Reform/Discalced. It is excellent and properly corrects/places in context things one can read in older resources that should be today seen in a different light.
As for the Little Office…the Little Offices were particularly for Religious who were not Choir Religious (which means they lacked sufficient education in Latin to be able to pray the Office, which then did not exist in the vernacular; they may have chosen this path of Religious Life either because they did not wish to pursue the necessary studies, were unable to, or they preferred the manual labour these roles normally entailed) and these Little Offices were also used by lay people, typically for the same reason of not being able to use the Latin texts.
I remember using the Little Office of the Blessed Virgin when I was a child, many many many years ago, as I wanted to begin to pray the Office but it was not accessible to us then.
Thankfully, with the renewal and reform of the liturgy, the Divine Office (that is the Liturgy of the Hours, as we properly term it today) is accessible to everyone. Everyone is encouraged today to pray it, either in Latin or in a vernacular language. A lay woman on her train commute to and from work can pray Lauds (Morning Prayer) and Vespers (evening prayer) and thus pray/celebrate the liturgy of the Church from her train seat.
The one volume Christian Prayer gives access to Morning Prayer, Daytime Prayer, Evening Prayer and Night Prayer – it does not include the Office of Readings – with the Proper of Seasons and the Propers for the Saints.
It is the summit of an individual praying since it is, truly, the liturgy of the Church even when prayed by individual laity.
The Liturgy of the Hours is also available electronically through various websites.