What books address various difficulties that may arise during various stages of meditation practice? I am looking for books that go beyond the usual introduction on how to do various form of Buddhist meditation practice but rather, in addition to describing the practices themselves, discuss various difficulties that may arise during various stages of meditation practice and what can be actively done to address these difficulties.
The Five Hindrances disturb one's path in meditation and practice. The canonical description can be found in the Nivarana Sutta.

Here are some useful resources:

Book entitled Unhindered: A Mindful Path Through the Five Hindrances by Gil Fronsdal.

A selection of texts and their commentaries on The Five Mental Hindrances and Their Conquest by Nyanaponika Thera.

Essay on The Five Hindrances by Ajahn Brahmavamso. Another version of this.

Audio recordings on The Five Hindrances by Gil Fronsdal and Ines Freedman.

Online handouts: The Five Hindrances: Handouts for 2008-2009 Dharma Study Program. These seem to come from Gil Fronsdal. Should match the audio recordings.

Practicing with the Five Hindrances, a Q&amp;A with Geri Larkin, Lama Palden, Ajahn Amaro, Michael Liebenson Grady and Sharon Salzberg.

Working with The Five Hindrances by Barbara O'Brien.

Yet another article: Methods of Working on the Five Hindrances
 by Kamalashila.