Question: Small Steps is the sequel to the book released in what year?

Context articles: Small Steps (album)
Split-step method
Small Steps: The Year I Got Polio
Small Steps (novel)
Twelve Small Steps, One Giant Disappointment
Small Steps, Heavy Hooves
Minuet
Unbroken (María Ólafsdóttir song)
Dear and the Headlights
Holes (novel)

Small Steps is the second album by the hip-hop group Heiruspecs.
 It was released in March 2002 on Interlock Records.
In numerical analysis, the split-step (Fourier) method is a pseudo-spectral numerical method used to solve nonlinear partial differential equations like the nonlinear Schrödinger equation.
 The name arises for two reasons.
 First, the method relies on computing the solution in small steps, and treating the linear and the nonlinear steps separately (see below).
 Second, it is necessary to Fourier transform back and forth because the linear step is made in the frequency domain while the nonlinear step is made in the time domain.
Small Steps: The Year I Got Polio is a memoir of author Peg Kehret's childhood experience of polio.
 The book won the Golden Kite Award in 1997.
Small Steps is a 2006 novel for young adults by Louis Sachar, first published by Delacorte Books (Dell).
 It is the sequel to "Holes", although the main character of "Holes", Stanley Yelnats, is only briefly and indirectly mentioned.
Twelve Small Steps, One Giant Disappointment is the third studio album from the American indie rock band, Bad Astronaut.
 It was released in November, 2006, on Fat Wreck Chords and follows "" from 2002 and "Acrophobe" from Feb 2001 on Honest Don's.
 Due to the death of drummer Derrick Plourde, it is Bad Astronaut's final album.
 It is also the only Bad Astronaut release to feature all original material.
Small Steps, Heavy Hooves is the debut album by Dear and the Headlights.
 The album was released on February 6, 2007 on Equal Vision Records.
A minuet ( ; also spelled "menuet"), is a social dance of French origin for two people, usually in  time.
 The word was adapted from Italian "minuetto" and French "menuet", possibly from the French "menu" meaning slender, small, referring to the very small steps, or from the early 17th-century popular group dances called "branle à mener" or "amener".
"Unbroken" is a song performed by Icelandic singer María Ólafsdóttir.
 The song represented Iceland in the Eurovision Song Contest 2015.
 It was originally performed in Icelandic as "Lítil skref" (Small steps).
Dear and the Headlights was an American indie rock band from Phoenix, Arizona, formed in 2005 They released two widely known demos, recorded by future bassist Chuckie Duff, before their debut album was released.
 These demos included five songs re-recorded for the album.
 The most notable change to the songs upon re-recording was the drop from standard guitar tuning to E-flat standard tuning.
 Two songs heard on their purevolume.com page, recorded acoustic on a local radio show, also later appeared on "Small Steps, Heavy Hooves".
 "Small Steps, Heavy Hooves", the band's debut album, was released on February 6, 2007 on Equal Vision Records.
Holes is a 1998 young adult mystery comedy novel written by Louis Sachar and first published by Farrar, Straus and Giroux.
 It won the 1998 U.S. National Book Award for Young People's Literature