Checking back in with:
Book 19 - Sheri S Tepper - The Waters Rising (took a while to get into it, but ultimately enjoyed it. Strong environmental themes as with most of her books)
Book 20 - Stephen King - The Shining (excellent)
Book 21 - Jeanne DuPrau - The City of Ember (entertaining. Two teenagers are looking for way to save their underground city)
Book 22 - Rachel Vincent - Shadow Bound (good)
Book 23 - Charles Stross - The Clan Corporate (3rd in Merchant Princes series. Good, but I think you really need to have read the first 2 to follow it)
Book 24 - Mia James - Darkness Falls (okay. Vampire troubles at London school)
Book 25 - Kim Izzo - The Jane Austen Marriage Manual (I found it very hard to suspend disbelief with this one. There's some ludicrous plot points)
Book 26 - Melissa de la Cruz - Serpents Kiss (flimsy and unmemorable)
Book 27 - Meg Cabot - Underworld (sequel to Abandon. Good, but again, you really need to have read the first one)
Book 28 - Georgette Heyer - The Convenient Marriage (thoroughly entertaining)
Book 29 - Adele Parks - Game Over (good)