We recommend Abraham Rudolph (Editor) et al. Rudolph's Fundamentals of Pediatrics (21st Edition, McGraw-Hill Publishers, 2002) as the core textbook for the pediatric clerkship.
(Alternatively, you may prefer:  Jerold C. Woodhead: Pediatric Clerkship Guide, Mosby Publishers

The following is a list of other recommended texts available online through the Ehrman Medical Library:
Harriet Lane Handbook: A Manual for Pediatric House Officers
Nelson Textbook of Pediatrics
Rudolph's Pediatrics
Current Pediatric Diagnosis & Treatment

The following is a list of additional pediatric texts that also provide a good foundation in general pediatrics:
Richard E. Behrman, MD (Editor), et al.: Nelson Textbook of Pediatrics.
Robert Dershewitz (Editor): Ambulatory Pediatric Care
William Hay, MD (Editor), et al.: Current Pediatric Diagnosis and Treatment. Also available as an e-text.
Frank A. Oski et al.: Principles and Practice of Pediatrics
Colin David Rudolph (Editor), et al.: Rudolph's Pediatrics.
Basil J. Zitelli (Editor), et al.: Atlas of Pediatric Physical Diagnosis.