| ⇢ | A | Model added |
| ⇢ | A | GoogleBooks::removeBaseUrl() added | |
| ⇢ | A | Bookshelf::getUid() added | |
| ⇢ | A | Model::__construct() added | |
| ⇢ | A | Model::expandToFullRecord() added | |
| ⇢ | A | Model::get() added | |
| ⇢ | A | Model::has() added | |
| ⇢ | A | Model::isSearchResult() added | |
| ⇢ | A | Model::getIterator() added | |
| ⇢ | A | Model::__toString() added | |
| ⇢ | A | Model::__get() added | |
| D | ↗ | C | Volume::getCover() improved |
| A | ↛ | Bookshelf::__construct() removed | |
| A | ↛ | Bookshelf::__get() removed | |
| A | ↛ | Volume::__construct() removed | |
| A | ↛ | Bookshelf::__toString() removed | |
| A | ↛ | Volume::__toString() removed |