Doctor Dolittle's Garden is structurally the most disorganised of Hugh Lofting's Doctor Dolittle books. The first part would fit very well into Doctor Dolittle's Zoo, which this book follows. The rest of the book forms a reasonably coherent narrative. Doctor Dolittle's assistant, Tommy Stubbins, reports on Professor Quetch, curator of the Dog Museum in the Home for Crossbred Dogs. Meanwhile, the doctor has learnt insect languages and hears ancient tales of a giant race of insects. Fascinated, the doctor plans a voyage to find them - but before he does so, one arrives in his garden.