The messages are a help in 40+ difficult circumstances

Use it or lose it (mental exercises)

A key to understanding these messages is on page 2 paragraph 5 where The Song of Prayer says

“Prayer is a stepping aside; a letting go; a quiet time of listening and loving.”

Each message of love supports an aspect of prayer.

Poem Section	Page	Aspect of Prayer	Trust
The Dream of Fear	115	stepping aside	undoing
The Two Gifts	118	stepping aside, letting go
The Ending of the Dream	119	listening, loving
Our Gift to God	123	brotherly love	achievement
The Father's Love	126	radiant love

God's messages of love correspond with the Development of Trust mentioned in Chapter 4 of the Manual. The six stages in the development of trust are periods of

undoing, sorting out, relinquishment, settling down, unsettling, achievement   

In The Dream of Fear message Jesus offers help in the
“period of undoing”. We can see as he does.

Working with Our Gift to God messages leads to “a period of
achievement”. We can become grateful for our brothers.

God's messages of love each contain a mighty force. Jesus first mentions mighty forces in the Text. In a 1967 “pep talk” for Helen and Bill he says (Text Chap 16, paragraph 9):

“This is the year for the application of the ideas that have been given you.   

For the ideas are mighty forces, to be used and not held idly by.”

Since the messages of love are an endpoint i.e. the termination of Helen's scribing with Jesus, no workbook follows. But you can fulfill a message by applying it. The article linked here shows which mental exercises (brief meditations) and messages can help with over forty difficult circumstances (e.g. abandonment, hopelessness, muscle tension, sadness, resistance, worry, ...).
These messages have applications for day-to-day life beyond the difficult circumstances mentioned above.