Horowitz and Hill is quite a good source of circuit diagrams in general, but as said in regards to textbooks in a previous post, it can be a bit limited in the descriptions it gives. Some circuits it shows without any suggestion of what equations you need to solve so as to find the appropriate components values to give desired behaviours.
There is also a series of pdfs I've seen based on old books called "Circards", the old books were compiled from the idea of a "deck of cards" each with a sample circuit on them. Someone on here gave me the link to them initially, they are a bit old in places in terms of the default ICs they often make use of, but many of them translate straight across to more modern devices (when something calls for an op-amp a modern one is usually "better" on almost all relevant performance metrics, so will usually give overall circuit performance as good as the old IC they specify would).