Question: What is the sequel to "Alice's Adventures in Wonderland" that critical studies have compared to "Threshold"

Context paragraphs:
Almost Alice: Almost Alice is a concept album of various artists' music inspired by Tim Burton's film, "Alice in Wonderland".  The album is also notable for featuring songs that were inspired from quotes directly from Lewis Carroll's original novel "Alice's Adventures in Wonderland".  For example, both "The Lobster Quadrille" (by Franz Ferdinand) and "You Are Old, Father William" (by They Might Be Giants) are both word-for-word performances of poems from the original "Alice" as quoted by The Mock-Turtle (the former) and Alice herself to the Caterpillar (the latter).  Furthermore, "Very Good Advice" by Robert Smith is a cover of Kathryn Beaumont's "Very Good Advice" from Disney's 1951 animated adaptation of "Alice in Wonderland".

Threshold model: In mathematical or statistical modelling a threshold model is any model where a threshold value, or set of threshold values, is used to distinguish ranges of values where the behaviour predicted by the model varies in some important way.  A particularly important instance arises in toxicology, where the model for the effect of a drug may be that there is zero effect for a dose below a critical or threshold value, while an effect of some significance exists above that value.  Certain types of regression model may include threshold effects.

Critical Studies in Media Communication: Critical Studies in Media Communication is a peer-reviewed academic journal covering media and mass communication from a cultural studies and critical perspective.  The journal is published by Routledge on behalf of the National Communication Association and the editors-in-chief are Peter Decherney and Katherine Sender.  From 1984 to 1999 it was published as "Critical Studies in Mass Communication".

Alice in Wonderland (1988 film): Alice in Wonderland is an Australian 51-minute direct-to-video animated film from Burbank Films Australia.  It was originally released in 1988.  The film is based on Lewis Carroll's classic English novel, "Alice's Adventures in Wonderland", first published in 1865, and was adapted by Paul Leadon.  Unlike many other adaptations of the novel, this one did not borrow elements from its sequel, "Through the Looking-Glass" (1871), combined into one film.  The production company produced a 73-minute adaptation of the second novel the year before, in 1987, entitled "Alice: Through the Looking-Glass".  The 1988 film was produced by Roz Phillips and directed by Rich Trueblood.  Quite uncommon among Burbank Films Australia's adaptations of classic literary works, "Alice in Wonderland" featured one original theme song, composed by Mark Isaacs.  The copyright in this film is now owned by Pulse Distribution and Entertainment and administered by digital rights management firm NuTech Digital.

Through the Looking-Glass: Through the Looking-Glass, and What Alice Found There (1871) is a novel by Lewis Carroll (Charles Lutwidge Dodgson), the sequel to "Alice's Adventures in Wonderland" (1865).  Set some six months later than the earlier book, Alice again enters a fantastical world, this time by climbing through a mirror into the world that she can see beyond it.  "Through the Looking-Glass" includes such celebrated verses as "Jabberwocky" and "The Walrus and the Carpenter", and the episode involving Tweedledum and Tweedledee.  The mirror which inspired Carroll remains displayed in Charlton Kings.

Ventilatory threshold: In kinesiology, the ventilatory threshold (VT1) refers to the point during exercise at which ventilation starts to increase at a faster rate than VO (V – volume , O – oxygen).  One's threshold is said to reflect levels of anaerobiosis and lactate accumulation.  As the intensity level of the activity being performed increases, breathing becomes faster; more steadily first and then more rapid as the intensity increases.  When breathing surpasses normal ventilation rate, one has reached ventilatory threshold.  For most people this threshold lies at exercise intensities between 50% and 75% of VO max.  A major factor affecting one's ventilatory threshold is their maximal ventilation (amount of air entering and exiting lungs).  This is dependent on their personal experience with the activity and how physically fit the person is.  Comparison studies of more athletic people have shown that your ventilatory threshold occurs at a higher intensity if you are more active or have been training for that exercise; although, in some cases shorter continuous tests can be used because of rapid alterations in ventilation.

Alice (Alice's Adventures in Wonderland): Alice is a fictional character and protagonist of Lewis Carroll's children's novel "Alice's Adventures in Wonderland" (1865) and its sequel, "Through the Looking-Glass" (1871).  A child in the mid-Victorian era, Alice unintentionally goes on an underground adventure after accidentally falling down a rabbit hole into Wonderland; in the sequel, she steps through a mirror into an alternative world.

The Beginning Place: The Beginning Place is a short novel by Ursula K. Le Guin, written in 1980.  It was subsequently published under the title "Threshold" in 1986.  The novel does not belong to any of the cycles for which Le Guin is well known.  The story's genre is a mixture of realism and fantasy literature.  The novel's epigraph "What river is this through which the Ganges flows?"  is quoted from Jorge Luis Borges.  The novel has been subject to critical studies comparing it to C.S. Lewis' "The Chronicles of Narnia", Lewis Carroll's "Through the Looking-Glass" and William Shakespeare's "As You Like It".

Peter McLaren: Peter McLaren (born August 2, 1948) is Distinguished Professor in Critical Studies, College of Educational Studies, Chapman University, where he is Co-Director of the Paulo Freire Democratic Project and International Ambassador for Global Ethics and Social Justice.  He is also Emeritus Professor of Urban Education, University of California, Los Angeles, and Emeritus Professor of Educational Leadership, Miami University of Ohio.  He is also Honorary Director of Center for Critical Studies in Education in Northeast Normal University, Changchun, China.

Comparative Critical Studies: Comparative Critical Studies is the journal of the British Comparative Literature Association (BCLA).  It is published three times a year by Edinburgh University Press, in February, June and October.  "Comparative Critical Studies" also incorporates "Comparative Criticism" (Cambridge University Press, 1979–2003) and "New Comparison" (BCLA, 1986–2003), which have now ceased publication.

Supporting paragraphs: The Beginning Place Through the Looking-Glass
Answer: Through the Looking-Glass