The Book of Love was a serious attempt by Air Supply to regain their position as pre-eminent adult contemporary artists.
During the early '90s, they released a couple of records that went ignored, but none were as carefully-considered as The Book of Love, which places them squarely in the '90s adult pop tradition, instead of finding them stuck in the '80s.
That alone makes the album worthwhile, but it doesn't excuse the uneven songwriting.
There's a few songs that are sparkling updates of the Air Supply formula -- "So Much Love" and "When I Say" both are lush, appealingly melodramatic and sappy ballads that work -- but there are more that simply fall flat.
Still, the very fact that some of The Book of Love works makes it Air Supply's best record in nearly a decade.