According to Humphrey

144 pages first pub 2004 (editions)

fiction childrens fantasy lighthearted fast-paced

150 pages first pub 2005 (editions)

fiction childrens lighthearted medium-paced

192 pages first pub 2007 (editions)

fiction childrens lighthearted slow-paced

136 pages first pub 2008 (editions)

fiction childrens fantasy informative lighthearted slow-paced

135 pages first pub 2008 (editions)

fiction childrens lighthearted fast-paced

134 pages first pub 2008 (editions)

fiction childrens informative lighthearted medium-paced

167 pages first pub 2009 (editions)

fiction childrens lighthearted slow-paced

164 pages first pub 2011 (editions)

fiction childrens fantasy lighthearted slow-paced

146 pages first pub 2012 (editions)

fiction mystery adventurous funny mysterious fast-paced

202 pages first pub 2012 (editions)

fiction childrens lighthearted fast-paced