I've listened to these podcasts which detail what each line is looking for. For anyone who's interested you can check them out at e-harlequin under their writing section 
Podcasts With The Editors at Harlequin
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I've listened. It is very interesting and informative. If you are/were targeting a book for harlequin these podcasts are a must hear.
Harlequin podcasts
Harlequin podcasts
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